WO2023229221A1 - 수지 조성물 및 성형품 - Google Patents
수지 조성물 및 성형품 Download PDFInfo
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- WO2023229221A1 WO2023229221A1 PCT/KR2023/004951 KR2023004951W WO2023229221A1 WO 2023229221 A1 WO2023229221 A1 WO 2023229221A1 KR 2023004951 W KR2023004951 W KR 2023004951W WO 2023229221 A1 WO2023229221 A1 WO 2023229221A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/06—Unsaturated polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/068—Copolymers with monomers not covered by C08L33/06 containing glycidyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Definitions
- the present invention relates to a resin composition and a biodegradable molded article formed therefrom.
- Thermoplastic resins have excellent mechanical and chemical properties and are used in various fields such as drinking water containers, medical applications, food packaging, food containers, automobile molded products, and agricultural vinyl.
- polyethylene films have excellent mechanical properties, are harmless to the human body, and can be continuously deformed when heated, so they are mainly used as hot sealing bags for food packaging and mulching films for agriculture.
- Hot sealing bags for food packaging are widely used for vacuum packaging food, etc., and polyethylene film, which can achieve excellent bonding strength even at low sealing temperatures, is mainly used.
- Agricultural mulching film is mainly used in mulching farming.
- Mulching is a material that covers the soil surface when growing crops. By covering the upper surface of the soil with various types of materials, the growth of weeds can be blocked, pests and diseases can be prevented, and the use of pesticides can be reduced. In addition, the soil temperature can be easily controlled, beneficial bacteria in the soil can be multiplied, soil erosion can be prevented, and soil moisture can be maintained.
- mulching materials leaves of crops such as rice straw and grass, or polyolefin-based films can be used, and synthetic resins such as polyethylene films are generally used.
- polyethylene film does not decompose in the natural environment and has limitations in recycling.
- plastics such as discarded polyethylene films are flowing into the sea, and are shredded into very small microplastics by reflux and sunlight in the sea.
- microplastics are known to be floating in the sea in countless quantities ranging from billions to tens of billions, and they enter the bodies of sea creatures, accumulate within the ecosystem, and affect the entire food chain.
- PBAT polybutylene adipate terephthalate
- PLA polylactic acid
- Compatibilizers for biodegradable resin compositions including PBAT and PLA can be divided into physical compatibilizers and chemical compatibilizers depending on their operating principles.
- a typical physical compatibilizer is a copolymer containing PBAT or PLA.
- mechanical properties are deteriorated because the physical compatibilizer performs a similar role to a plasticizer.
- Chemical compatibilizers use compounds containing functional groups that react with both ends of the polymer. Chemical compatibilizers act as chain extenders and exhibit the characteristic of increasing molecular weight. However, if the reaction of functional groups occurs excessively, the resin composition There is a problem in that processing is difficult due to the rapid increase in viscosity. Accordingly, in the case of conventional chemical compatibilizers, the amount used in the resin composition is generally extremely limited.
- Patent Document 1 discloses a biodegradable polyester film containing an epoxy group and comprising a copolymer based on styrene, acrylic acid ester, and/or methacrylic acid ester.
- the copolymer disclosed in Patent Document 1 is used as a compatibilizer for PBAT and PLA, when used above a certain amount, not only PBAT-g-PLA is formed at the interface of PBAT and PLA, but also PBAT-g-PBAT is formed in each resin. And/or a large amount of PLA-g-PLA is formed, causing a problem of rapidly increasing the viscosity of the resin composition.
- Patent Document 1 KR 10-2045863 B1
- the present invention was made to solve the problems of the prior art, and in a biodegradable resin composition containing different types of biodegradable resins, the compatibility between the different types of biodegradable resins is improved and melting is achieved. By controlling the number of domains in the index and dispersed phase, the mechanical properties are improved while preventing an increase in viscosity of the resin composition.
- the melt index and the number of domains in the dispersed phase are adjusted according to the improvement of compatibility, thereby improving the mechanical properties and increasing the viscosity of the resin composition.
- the purpose is to provide a resin composition that is prevented from forming and has excellent processability.
- the present invention aims to provide a molded article that is molded from the above resin composition and exhibits biodegradability.
- the present invention provides a resin composition and molded article.
- the present invention includes a continuous phase and a dispersed phase, wherein the continuous phase includes a first biodegradable resin, and the dispersed phase includes a second biodegradable resin, at 190° C. with a load of 5 kg according to ISO 1133.
- the present invention provides the resin composition according to (1) above, wherein the first biodegradable resin includes an aliphatic polyester unit and an aromatic polyester unit.
- the present invention provides the resin composition according to (1) or (2) above, wherein the first biodegradable resin contains polybutylene adipate terephthalate.
- the present invention provides the resin composition according to any one of (1) to (3) above, wherein the second biodegradable resin contains polylactic acid.
- the resin composition contains 50 parts by weight of the first biodegradable resin based on the total of 100 parts by weight of the first biodegradable resin and the second biodegradable resin.
- a resin composition comprising not less than 90 parts by weight or less, and not less than 10 parts by weight but not more than 50 parts by weight of a second biodegradable resin.
- the resin composition is prepared by adding a sample of 8 mg (error range 1 mg) using a differential scanning calorimeter (DSC) and heating it for 180 minutes under a nitrogen stream. Enthalpy of melting measured by first heating to °C at a heating rate of 10 °C/min, cooling to -50 °C at a lowering rate of 10 °C/min, and secondary heating to 180 °C at a heating rate of 10 °C/min.
- a resin composition having ( ⁇ Hm) of 0.01 J/g or more and 3.6 J/g or less is provided.
- the present invention provides the resin composition according to any one of (1) to (8) above, wherein the weight average molecular weight of the entire resin composition is 137,000 or more and 200,000 or less.
- the present invention provides the resin composition according to any one of (1) to (10) above, wherein the resin composition further includes at least one of an acrylic copolymer and a compatibilization portion formed from the acrylic copolymer. do.
- the acrylic copolymer includes a methyl (meth)acrylate monomer unit, a (meth)acrylate monomer unit containing an epoxy group, and an alkyl (meth)acrylate having 2 to 10 carbon atoms.
- a resin composition comprising a monomer unit is provided.
- the present invention according to (11) or (12) above, wherein the acrylic copolymer comprises 25% by weight or more and 65% by weight or less of methyl (meth)acrylate monomer units and (meth)acrylate monomer units containing an epoxy group.
- a resin composition comprising 15% by weight or more and 60% by weight or less and 5% by weight or more and 32% by weight or less of alkyl (meth)acrylate monomer units having 2 to 10 carbon atoms.
- the present invention according to any one of (11) to (13) above, wherein the resin composition contains the acrylic copolymer and the acrylic based on 100 parts by weight of the total of the first biodegradable resin and the second biodegradable resin.
- a resin composition comprising a compatibilized portion derived from a copolymer in an amount of 0.01 parts by weight or more and 10.0 parts by weight or less.
- the present invention provides the resin composition according to any one of (11) to (14) above, wherein the acrylic copolymer has an epoxy equivalent weight (E.E.W.) of 200 g/eq or more and 800 g/eq or less.
- E.E.W. epoxy equivalent weight
- the present invention provides the resin composition according to any one of (11) to (15) above, wherein the acrylic copolymer has a weight average molecular weight of 10,000 or more and 100,000 or less.
- the present invention provides the resin composition according to any one of (11) to (16) above, wherein the acrylic copolymer has a glass transition temperature of 45°C or more and 85°C or less.
- the present invention provides a molded article molded from the resin composition according to any one of (1) to (17) above.
- the resin composition of the present invention is a biodegradable resin composition containing heterogeneous biodegradable resins, and the melt index and the number of domains in the dispersed phase are adjusted according to the improvement of compatibility between the heterogeneous biodegradable resins, resulting in mechanical mechanical properties. While the physical properties are improved, the viscosity of the resin composition is prevented from increasing, resulting in excellent processability.
- molded articles made from the resin composition have excellent mechanical properties and exhibit biodegradability.
- Figure 1 is an image taken at a magnification of 25,000 using a transmission electron microscope of the resin composition prepared in Example 2 of the present invention.
- Figure 2 is an image showing domains for measuring the number and size of domains in a transmission electron microscope image for Example 2 of the present invention.
- Figure 3 is an image taken at a magnification of 25,000 using a transmission electron microscope of the resin composition prepared in Comparative Example 1 of the present invention.
- Figure 4 is an image showing domains for measuring the number and size of domains in a transmission electron microscope image of Comparative Example 1 of the present invention.
- the term 'monomer unit' may refer to a component, structure, or the substance itself derived from a monomer.
- the input monomer participates in the polymerization reaction and forms a repeating unit within the polymer. It could mean something.
- composition' used in the present invention includes mixtures of materials containing the composition as well as reaction products and decomposition products formed from the materials of the composition.
- the present invention provides a resin composition.
- the resin composition may be a biodegradable resin composition containing different types of biodegradable resin.
- the resin composition includes a continuous phase and a dispersed phase, the continuous phase includes a first biodegradable resin, the dispersed phase includes a second biodegradable resin, and a load of 5 kg at 190 ° C. according to ISO 1133
- the melt index measured is 3.0 g/10 min or more and 13.5 g/10 min or less, and the number of dispersed phase domains observed in an image taken at 25,000 magnification using a transmission electron microscope (TEM) may be 35 or more.
- TEM transmission electron microscope
- the resin composition may be a resin composition in which a dispersed phase formed including the second biodegradable resin is dispersed in a continuous phase formed including the first biodegradable resin.
- the first biodegradable resin and the second biodegradable resin are different types of biodegradable resin, and any resin known as a biodegradable resin can be used.
- the first biodegradable resin is an aliphatic polyester unit and an aromatic polyester unit. It may be a polyester-based resin containing polyester units.
- the first biodegradable resin may include polybutylene adipate terephthalate (PBAT).
- PBAT is a random copolymer of adipic acid, 1,4-butanediol, and terephthalic acid, and is proposed as a biodegradable resin alternative to low-density polyethylene.
- the PBAT can secure biodegradability from the aliphatic polyester unit formed by adipic acid and 1,4-butanediol, and mechanical properties from the aromatic polyester unit formed by terephthalic acid and 1,4-butanediol.
- the second biodegradable resin may include polylactic acid (PLA).
- PLA is an eco-friendly biodegradable resin that is produced from bio-based materials and naturally decomposes into water and carbon dioxide within a few months due to the action of microorganisms.
- the resin composition may contain the first biodegradable resin in an amount of 50 parts by weight or more and 90 parts by weight or less, based on a total of 100 parts by weight of the first biodegradable resin and the second biodegradable resin.
- the resin composition contains 50 parts by weight or more, 55 parts by weight, 60 parts by weight, or 65 parts by weight of the first biodegradable resin, based on 100 parts by weight of the total of the first biodegradable resin and the second biodegradable resin. It may be included in an amount of more than or equal to 70 parts by weight, and may also be included in an amount of less than 90 parts by weight, less than 85 parts by weight, or less than 80 parts by weight, and within this range, mechanical properties and processability are more excellent. can do.
- the resin composition may include the second biodegradable resin in an amount of 10 parts by weight or more and 50 parts by weight or less based on a total of 100 parts by weight of the first biodegradable resin and the second biodegradable resin.
- the resin composition includes the second biodegradable resin in an amount of 10 parts by weight or more, 15 parts by weight, or 20 parts by weight or more, based on 100 parts by weight of the total of the first biodegradable resin and the second biodegradable resin. It can also be included in an amount of 50 parts by weight or less, 45 parts by weight or less, 40 parts by weight or less, 35 parts by weight or less, or 30 parts by weight or less, and within this range, mechanical properties and processability are more excellent. can do.
- the resin composition may have a melt index of 3.0 g/10 min or more and 13.5 g/10 min or less, as measured at 190°C with a load of 5 kg according to ISO 1133.
- the melt index represents viscosity, which is one of the indicators of compatibility between different types of biodegradable resins in the resin composition. When the viscosity of the resin composition increases, the melt index decreases. In other words, a low melt index means high viscosity, and if the melt index is low, the viscosity increases and processability may decrease.
- the epoxy group of the acrylic copolymer described next may react with the carboxylic acid group of polybutylene adipate terephthalate and/or polylactic acid.
- the resin composition has a melt index of 3.0 g/10 min or more, 3.5 g/10 min or more, 4.0 g/10 min or more, and 4.5 g/10 min measured at 190°C with a load of 5 kg according to ISO 1133.
- 4.8 g/10 min or more may also be 13.5 g/10 min or less, 13.4 g/10 min or less, 13.3 g/10 min or less, 13.2 g/10 min or less, 13.1 g/10 min or less, 13.0 g/10 min or less, 12.9 g/10 min or less, 12.8 g/10 min or less, 12.7 g/10 min or less, 12.6 g/10 min or less, 12.5 g/10 min or less, 12.4 g/10 min or less, 12.3 g /10 min or less, 12.2 g/10 min or less, 12.1 g/10 min or less, 12.0 g/10 min or less, 11.9 g/10 min or less, 11.8 g/10 min or less, or 11.7 g/10 min or less, Within this range, compatibility between different types of biodegradable resins is improved, thereby improving mechanical properties and preventing the viscosity of the resin composition from increasing, resulting in better processability.
- the resin composition may have 35 or more dispersed phase domains observed in an image taken at 25,000 magnification using a transmission electron microscope (TEM).
- TEM transmission electron microscope
- the dispersed phase containing the second biodegradable resin forms domains in the continuous phase containing the first biodegradable resin.
- the number of domains of the dispersed phase dispersed in the same continuous phase varies depending on the compatibility of the first biodegradable resin and the second biodegradable resin. That is, as the compatibility between the first biodegradable resin and the second biodegradable resin improves, the number of domains of the dispersed phase dispersed in the same continuous phase increases.
- the resin composition has a dispersed phase domain number of 35 or more, 40 or more, 45 or more, 50 or more, 55 or more, as observed in an image taken at 25,000 magnification using a transmission electron microscope (TEM). It may be 60 or more, 65 or more, 70 or more, 75 or more, 80 or more, 85 or more, 90 or more, 95 or more, or 100 or more, and the upper limit is not particularly limited, but is 1,000 or less, It may be 900 or fewer, 800 or fewer, 700 or fewer, 600 or fewer, 500 or fewer, 400 or fewer, 300 or fewer, 200 or fewer, or 150 or fewer, within this range the heterogeneous biodegradability The compatibility between resins is improved, improving mechanical properties and preventing the viscosity of the resin composition from increasing, resulting in better processability.
- TEM transmission electron microscope
- the image taken at a magnification of 25,000 using the transmission electron microscope (TEM) may be an image with a width (short axis) of 3.4 ⁇ m and a length (long axis) of 4.9 ⁇ m.
- the domain to be measured is a domain whose long axis is 150 nm or more in the transmission electron microscope image, When the brightness is divided into 0 for black and 10 for white, the domain may have a brightness of 9 or more.
- the domain size is the arithmetic average of the size based on the major axis of each domain.
- the domain may be polylactic acid, and the matrix, which is a continuous phase, may be polybutylene adipate terephthalate.
- the domain may be a feature that can be estimated through the difference in glass transition temperature and melt viscosity of polylactic acid and polybutylene adipate terephthalate.
- the domain has a glass transition temperature of polybutylene adipate terephthalate at a low temperature (about -30 °C), while the glass transition temperature of polylactic acid is at a high temperature (about 60 °C), so the two resins can be used under the same processing conditions. This may correspond to a morphology characteristic that appears because the flowability of is dramatically different.
- polylactic acid which is a dispersed phase observed in images confirmed through a transmission electron microscope, is confirmed to be bright and colored, which allows us to estimate that the influence of the transmitted beam is stronger than that of polybutylene adipate terephthalate resin.
- the resin composition may have a domain size of the dispersed phase observed in an image taken at 25,000 magnification using a transmission electron microscope (TEM) of 700 nm or less.
- TEM transmission electron microscope
- the domain size of the dispersed phase dispersed in the same continuous phase varies. That is, the better the compatibility between the first biodegradable resin and the second biodegradable resin, the smaller the domain size of the dispersed phase dispersed in the same continuous phase.
- the resin composition has a domain size of the dispersed phase observed in an image taken at 25,000 magnification using a transmission electron microscope (TEM) of 700 nm or less, 650 nm or less, 500 nm or less, 450 nm or less, or 400 nm or less.
- the lower limit is not particularly limited, but may be 10 nm or more, 50 nm or more, 100 nm or more, 150 nm or more, or 200 nm or more, and within this range, compatibility between different types of biodegradable resins may be determined.
- the mechanical properties are improved and the viscosity of the resin composition is prevented from increasing, resulting in better processability.
- the size of the image and the selection criteria for the domain are the same as those described above, and the domain size is based on the long axis of each domain of the dispersed phase observed in the image taken at 25,000 magnification using a transmission electron microscope (TEM). It may mean that one size is within the above range, or it may mean that the arithmetic mean value of the domain size is within the above range.
- TEM transmission electron microscope
- the resin composition was prepared by adding an 8 mg (error range: 1 mg) sample using a differential scanning calorimeter (DSC), first heating it at a temperature increase rate of 10 °C/min to 180 °C under a nitrogen stream, and then heating at 10 °C/min.
- the melting enthalpy ( ⁇ Hm) measured by cooling to -50°C at a temperature lowering rate and secondary heating at a temperature increase rate of 10°C/min to 180°C may be 0.01 J/g or more and 3.6 J/g or less.
- the melting enthalpy ( ⁇ Hm) is an indicator of compatibility between different types of biodegradable resins in the resin composition, a specific example being a second biodegradable resin, and a more specific example being cold crystallization of polylactic acid. It may represent the melting enthalpy ( ⁇ Hm) generated in the process.
- the resin composition includes different types of biodegradable resins, the crystallinity of the second biodegradable resin decreases depending on the compatibility between them, which is manifested as a decrease in the cold crystallization peak and a decrease in melting enthalpy.
- Melting enthalpy is a measurement of the melting enthalpy ( ⁇ Hm) according to the degree of cold crystallization, which changes depending on the compatibility of different types of biodegradable resins in the resin composition.
- the resin composition was prepared by adding an 8 mg (error range: 1 mg) sample using a differential scanning calorimeter (DSC) and first heating it at a temperature increase rate of 10 °C/min to 180 °C under a nitrogen stream, followed by 10
- the melting enthalpy ( ⁇ Hm) measured by cooling to -50 °C at a lowering rate of °C/min and secondary heating to 180 °C at a heating rate of 10 °C/min is 0.01 J/g or more, 0.02 J/g or more, may be greater than or equal to 0.03 J/g, greater than or equal to 0.04 J/g, greater than or equal to 0.05 J/g, greater than or equal to 0.06 J/g, greater than or equal to 0.07 J/g, greater than or equal to 0.08 J/g, greater than or equal to 0.09 J/g, or greater than or equal to 0.1 J/g; , In addition, it may be 3.6 J/g or less, or 3.5 J/g or less, and
- the resin composition may have a weight average molecular weight of 137,000 or more and 200,000 or less.
- the resin composition may have a weight average molecular weight of 137,000 or more, 137,500 or more, or 138,000 or more, and may also have a weight average molecular weight of 200,000 or less, 195,000 or less, 190,000 or less, 185,000 or less, 180,000 or less, 175,000 or less, and 170,000 or less.
- 00 or less may be 165,000 or less, 160,000 or less, or 159,000 or less, and within this range, in heterogeneous biodegradable resins, particularly polybutylene adipate terephthalate and/or polylactic acid, polybutylene adipate terephthalate-
- a graft polymer such as g-polylactic acid (PBAT-g-PLA) at an appropriate level
- PBAT-g-PLA g-polylactic acid
- the weight average molecular weight may be expressed without units, but depending on the molar mass, it may be expressed in units of g/mol.
- the resin composition may have a tensile strength of 245 kgf/cm 2 or more and 500 kgf/cm 2 or less, as measured at a tensile speed of 50 mm/min according to ASTM D638.
- the resin composition may have a tensile strength measured according to ASTM D638 of 245 kgf/cm 2 or more, 250 kgf/cm 2 or more, 255 kgf/cm 2 or more, or 260 kgf/cm 2 or more.
- kgf/cm 2 or less 500 kgf/cm 2 or less, 490 kgf/cm 2 or less, 480 kgf/cm 2 or less, 470 kgf/cm 2 or less, 460 kgf/cm 2 or less, 450 kgf/cm 2 or less, 440 kgf/cm 2 or less, 430 It may be kgf/cm 2 or less, 420 kgf/cm 2 or less, or 415 kgf/cm 2 or less.
- the resin composition may have an elongation of 400% or more as measured according to ASTM D638.
- the resin composition has an elongation measured according to ASTM D638 of 400% or more, 410% or more, 420% or more, 430% or more, 440% or more, 450% or more, 460% or more, 470% or more, or 480% or more.
- the resin composition may further include at least one of an acrylic copolymer and a compatibilized portion formed from the acrylic copolymer.
- the acrylic copolymer is a copolymer containing a reactive functional group such as an epoxy group, and may be included as a chemical compatibilizer to improve compatibility with PBAT and PLA in the resin composition.
- the acrylic copolymer may exist as such in the resin composition, or the reactive functional group may react with the first biodegradable resin and the second biodegradable resin and may exist in the form of a compatibilization portion through a chemical bond, and the two forms may coexist. It may be possible.
- the acrylic copolymer may be an acrylic copolymer copolymerized with a methyl (meth)acrylate monomer, a (meth)acrylate monomer containing an epoxy group, and an alkyl (meth)acrylate monomer having 2 to 10 carbon atoms.
- the acrylic copolymer may be a random copolymer copolymerized with a methyl (meth)acrylate monomer, a (meth)acrylate monomer containing an epoxy group, and an alkyl (meth)acrylate monomer having 2 to 10 carbon atoms. and may be a linear random copolymer.
- ‘(meth)acrylate’ includes both acrylate and methacrylate.
- the acrylic copolymer may contain methyl (meth)acrylate monomer units in an amount of 25% by weight or more and 65% by weight or less.
- the acrylic copolymer contains methyl (meth)acrylate monomer units formed from methyl (meth)acrylate monomers in an amount of 25% by weight or more, 30% by weight, 35% by weight, or 40% by weight or more. It may be included in an amount of 65% by weight or less, 60% by weight or less, 55% by weight or less, or 50% by weight or less, and within this range, it has excellent compatibility with the second biodegradable resin. , the compatibility with the first biodegradable resin is relatively excellent, and the compatibility between the first biodegradable resin and the second biodegradable resin can be further improved.
- the acrylic copolymer may contain an epoxy group-containing (meth)acrylate monomer unit formed from an epoxy group-containing (meth)acrylate monomer unit in an amount of 15% by weight to 60% by weight.
- the acrylic copolymer contains 15% by weight, 20% by weight, 25% by weight, or 30% by weight of (meth)acrylate monomer units containing an epoxy group, which are formed from (meth)acrylate monomers containing an epoxy group. It may be included in an amount of 35% by weight or more, or 40% by weight or more, and may also be included in an amount of 60% by weight or less, 55% by weight or less, 50% by weight or less, or 45% by weight or less.
- the flexibility of the polymer chain can be increased, and the compatibility of the first biodegradable resin and the second biodegradable resin can be further improved.
- the chain between the film interfaces May increase spreading and entanglement.
- the (meth)acrylate monomer containing the epoxy group may be a (meth)acrylate monomer containing a glycidyl group, and a specific example may be a glycidyl (meth)acrylate monomer.
- the (meth)acrylate monomer containing the epoxy group reacts chemically with the epoxy group contained in the monomer with the hydroxy group (-OH) or carboxylic acid group (-COOH) contained in the first biodegradable resin or the second biodegradable resin. It can function as a compatibilizer. Additionally, when the above reaction occurs at the interface between the first biodegradable resin and the second biodegradable resin, the compatibility and interfacial adhesion of the first biodegradable resin and the second biodegradable resin can be further improved.
- the acrylic copolymer may contain alkyl (meth)acrylate monomer units having 2 to 10 carbon atoms formed from alkyl (meth)acrylate monomers having 2 to 10 carbon atoms in an amount of 5% by weight to 32% by weight. there is.
- the acrylic copolymer contains 5% by weight or more, 10% by weight or more, or 15% by weight of alkyl (meth)acrylate monomer units having 2 to 10 carbon atoms formed from alkyl (meth)acrylate monomers having 2 to 10 carbon atoms. It may be included in an amount of more than 32% by weight, 31% by weight or less, 30% by weight or less, 25% by weight or less, or 20% by weight or less, within this range.
- the flexibility of the polymer chain can be increased, and the compatibility between the first and second biodegradable resins can be further improved.
- chain diffusion and entanglement between the film interfaces can be prevented. can be increased.
- the alkyl (meth)acrylate monomer having 2 to 10 carbon atoms is ethyl (meth)acrylate, n-propyl (meth)acrylate, iso-propyl (meth)acrylate, n-butyl (meth)acrylate, iso -Butyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, iso-octyl (meth)acrylate ) acrylate, 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, iso-decyl (meth)acrylate, dodecyl (meth)acrylate, iso-bornyl (meth)acrylate and lauryl ( It may be one or more types selected from the group consisting of meth)
- the alkyl (meth)acrylate monomer having 2 to 10 carbon atoms may be an alkyl (meth)acrylate monomer having 3 to 9 carbon atoms or 4 to 8 carbon atoms, and more specific examples include butyl (meth)acrylate and 2 -It may be one or more types selected from the group consisting of ethylhexyl (meth)acrylate.
- the acrylic copolymer includes a monomer mixture including the methyl (meth)acrylate monomer, a (meth)acrylate monomer containing an epoxy group, and an alkyl (meth)acrylate monomer having 2 to 10 carbon atoms, a polymerization initiator, an emulsifier, etc. It can be prepared by emulsion polymerization of a composition for polymerization containing the polymerization composition.
- the polymerization temperature and polymerization time can be adjusted as needed.
- the polymerization time can be from 0.5 hours to 20 hours within a polymerization temperature range of 50 °C to 200 °C. there is.
- the polymerization initiator may be an inorganic or organic peroxide, and specific examples include water-soluble polymerization initiators including potassium persulfate, sodium persulfate, and ammonium persulfate, and oil-soluble polymerization including cumene hydroperoxide and benzoyl peroxide. It may be an initiator.
- An activator may be used together with the polymerization initiator to promote the initiation of the reaction of peroxide, and such activator includes a group consisting of sodium formaldehyde sulfoxylate, sodium ethylenediaminetetraacetate, ferrous sulfate, and dextrose. One or more types selected from may be used.
- the polymerization initiator may be added in an amount of 0.1 to 10 parts by weight, and as a specific example, 0.1 to 5 parts by weight, based on 100 parts by weight of the monomer mixture on a dry weight basis.
- the polymerization may be carried out by further including a chain transfer agent (or chain transfer agent) from the viewpoint of increasing the efficiency of the polymerization reaction.
- the chain transfer agent may serve to introduce homopolymers, which are polymers composed of only one type of monomer, into micelles during the polymerization process.
- the chain transfer agent may be a straight-chain or branched-chain alkylthiol compound having 5 to 20 carbon atoms, and specific examples include hexanethiol, cyclohexanethiol, adamantanethiol, heptanethiol, octanethiol, nonanethiol, decanethiol, and undecane.
- the chain transfer agent may be added in an amount of 0.1 parts by weight to 10 parts by weight based on dry weight, based on 100 parts by weight of the monomer mixture, and as a specific example, it may be added in an amount of 0.1 parts by weight to 5 parts by weight.
- the emulsion polymerization may be performed including the following steps (S10) to (S30).
- (S30) Step In the presence of a polymerization initiator, mixing the emulsion prepared in the (S10) step and the preemulsion prepared in the (S20) step and performing emulsion polymerization.
- Emulsion polymerization to polymerize the acrylic copolymer may be performed according to steps (S10) to (S30) above.
- an emulsion containing an emulsifier is prepared. This is separate from the pre-emulsion manufacturing process below.
- an emulsifier an anionic emulsifier can be used alone, or an anionic emulsifier, a cationic emulsifier, and a nonionic emulsifier can be used together, and an emulsifier can be prepared by mixing these emulsifier components and a solvent such as water.
- initial micelle particles of several nanometers in size can be stably formed.
- a pre-emulsion containing the monomer mixture is prepared by mixing each of the above-mentioned monomers, emulsifier, etc. with water.
- an emulsifier an anionic emulsifier can be used alone, or an anionic emulsifier and the above-mentioned nonionic emulsifier can be used together.
- nano-sized latex particles may be formed in the pre-emulsion. That is, the above-described emulsifier can be used in any one or more of the emulsion preparation step and the pre-emulsion preparation step.
- step (S30) after adding the polymerization initiator to the prepared emulsion, the pre-emulsion and the polymerization initiator are continuously added in equal proportions for a predetermined time.
- the content of the polymerization initiator added to the emulsion may be greater than 0 part by weight to 1 part by weight based on 100 parts by weight of the monomer mixture, and the content of the polymerization initiator added with the pre-emulsion is 0.1 part by weight based on 100 parts by weight of the monomer mixture. It may be from 2 parts by weight to 2 parts by weight, and the continuous addition time may be from about 3 hours to about 7 hours.
- suspended monomers or polymers in the pre-emulsion may flow into the initial particles generated in the emulsion.
- the results of this reaction may then undergo a heating polymerization process in the presence of an additional polymerization initiator, through which the remaining monomers are polymerized.
- the polymerization initiator may be added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the monomer mixture, and the heated polymerization is performed at a temperature of about 75 ° C. to about 85 ° C. for about 40 minutes to about 80 minutes. It can proceed.
- This emulsion polymerization method is divided into an emulsion preparation process and a pre-emulsion preparation process, and can then be carried out by simply mixing the pre-emulsion with the emulsion, thereby improving process stability and productivity compared to conventional methods. .
- the emulsifier used in the emulsion polymerization may include at least one selected from the group consisting of anionic emulsifiers, cationic emulsifiers, and nonionic emulsifiers.
- the emulsifier is a substance that has both hydrophilic and hydrophobic groups. During the emulsion polymerization process, it forms a micelle structure and allows polymerization of each monomer to occur within the micelle structure.
- Emulsifiers commonly used in emulsion polymerization can be divided into anionic emulsifiers, cationic emulsifiers, and nonionic emulsifiers, and two or more types may be mixed together in terms of polymerization stability in emulsion polymerization.
- the nonionic emulsifier may include one or more selected from the group consisting of polyethylene oxide alkyl aryl ether, polyethylene oxide alkyl amine, and polyethylene oxide alkyl ester.
- the anionic emulsifiers include sodium alkyl diphenyl ether disulfonate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene aryl ether sulfate, sodium alkyl sulfate, sodium alkyl benzene sulfonate, and dialkyl sodium sulfosuccinate. It may include one or more types selected from the group consisting of.
- the emulsifier may be used in an amount of about 0.1 parts by weight to about 10 parts by weight, or about 1 part by weight to about 5 parts by weight, based on a total of 100 parts by weight of monomer components used in the production of the latex particles.
- the composition for polymerization may further include an aqueous solvent such as water in addition to the emulsifier or monomer component.
- an aqueous solvent such as water in addition to the emulsifier or monomer component.
- the aqueous solvent may be used in an amount of about 10 to about 1,000 parts by weight based on 100 parts by weight of the latex particles, and based on the total amount of the composition, the total solid content (total solid content (TSC) can be used to adjust from about 10% by weight to about 60% by weight.
- the resin composition includes the acrylic copolymer and the compatibilized portion derived from the acrylic copolymer in an amount of 0.01 parts by weight or more and 10.0 parts by weight or less, based on 100 parts by weight of the total of the first biodegradable resin and the second biodegradable resin. It may be. As a specific example, the resin composition contains the acrylic copolymer and the compatibilized portion derived from the acrylic copolymer at 0.01 parts by weight or more, 0.02 parts by weight or more, based on 100 parts by weight of the total of the first biodegradable resin and the second biodegradable resin.
- Part by weight or less 9.0 parts by weight or less, 8.0 parts by weight or less, 7.0 parts by weight or less, 6.0 parts by weight or less, 5.0 parts by weight or less, 4.5 parts by weight or less, 4.0 parts by weight or less, 3.5 parts by weight or less, 3.0 parts by weight or less, 2.5 parts by weight or less It may be included in an amount of less than 1.0 parts by weight, less than 2.0 parts by weight, less than 1.5 parts by weight, or less than 1.0 parts by weight. Within this range, compatibility between different types of biodegradable resins is further improved, resulting in further mechanical properties. While improving, the viscosity of the resin composition is prevented from increasing, resulting in better processability.
- the acrylic copolymer may have an epoxy equivalent weight (E.E.W.) of 200 g/eq or more and 800 g/eq or less.
- the acrylic copolymer has an epoxy equivalent weight (E.E.W) of 200 g/eq or more, 210 g/eq or more, 220 g/eq or more, 230 g/eq or more, 240 g/eq or more, 250 g/eq or more, 260 g/eq or more, 270 g/eq or more, 280 g/eq or more, 290 g/eq or more, 300 g/eq or more, 310 g/eq or more, 320 g/eq or more, 330 g/eq or more, 340 g /eq or more, or 350 g/eq or more, 800 g/eq or less, 700 g/eq or less, 600 g/eq or less, 500 g/eq or more
- the acrylic copolymer may have a weight average molecular weight of 10,000 or more and 100,000 or less.
- the acrylic copolymer may have a weight average molecular weight of 10,000 or more, 15,000 or more, 20,000 or more, 25,000 or more, or 30,000 or more, and may also have a weight average molecular weight of 100,000 or less, 90,000 or less, 80,000 or less, 70,000 or less, 60,000 or less, and 50,000 or less. It may be less than or equal to 40,000, and within this range, the function as a chemical stone compatibilizer can be more excellent without impairing the inherent properties of different types of biodegradable resins, especially polyester resins.
- the weight average molecular weight may be expressed without units, but depending on the molar mass, it may be expressed in units of g/mol.
- the acrylic copolymer may have a glass transition temperature of 45°C or more and 85°C or less.
- the acrylic copolymer has a glass transition temperature of 45 °C or higher, 46 °C or higher, 47 °C or higher, 48 °C or higher, 49 °C or higher, 50 °C or higher, 51 °C or higher, 52 °C or higher, 53 °C or higher, 54 °C or higher.
- It may be 55 °C or higher, 56 °C or higher, 57 °C or higher, 58 °C or higher, or 59 °C or higher, and may also be 85 °C or lower, 84 °C or lower, 83 °C or lower, 82 °C or lower, 81 °C or lower, 80 °C or higher. It may be 79 °C or lower, 78 °C or lower, 77 °C or lower, 76 °C or lower, 75 °C or lower, 74 °C or lower, 73 °C or lower, 72 °C or lower, 71 °C or lower, or 70 °C or lower, within this range. Processing of a resin composition containing heterogeneous biodegradable resins with a compatibilizer may be easier.
- the present invention provides a molded article.
- the molded article may be a biodegradable molded article formed from the resin composition, that is, a biodegradable resin composition.
- the molded product includes both injection molded products formed through injection, etc., as well as film molded products formed by film formation.
- the molded product may be a biodegradable film, and as a specific example, it may be a film for use as an agricultural mulching film or food packaging material.
- a total of 100 weight of the monomers methyl methacrylate, glycidyl methacrylate, butyl acrylate and 2-ethylhexyl acrylate were placed in a 3 L capacity glass reactor equipped with a thermometer, stirrer, dropping funnel, nitrogen introduction tube and reflux condenser. Based on parts, 200 parts by weight of distilled water and 0.5 parts by weight of sodium dioctyl sulfosuccinate (sodium bis(2-ethylhexyl) sulfosuccinate) as an emulsifier were added and stirred. During stirring, the inside of the reactor was replaced with nitrogen gas, the temperature of the glass reactor was raised to 70°C, 0.2 parts by weight of potassium persulfate was added, and the mixture was stirred for 10 minutes.
- sodium dioctyl sulfosuccinate sodium bis(2-ethylhexyl) sulfosuccinate
- the temperature inside the glass reactor was maintained at 70°C for 30 minutes and then cooled to room temperature.
- the obtained emulsion polymerization result was coagulated using an aqueous calcium acetate solution, heat-treated at a temperature of up to 85°C, dehydrated, and dried at 60°C for 16 hours to obtain an acrylic copolymer.
- An acrylic copolymer was obtained in the same manner as Preparation Example 1, except that 15 parts by weight of 2-ethylhexyl acrylate was added instead of 15 parts by weight of butyl acrylate.
- Preparation Example 1 the same method as Preparation Example 1 was carried out, except that 55 parts by weight of methyl methacrylate was added instead of 45 parts by weight, and 30 parts by weight of glycidyl methacrylate was added instead of 40 parts by weight. An acrylic copolymer was obtained.
- Preparation Example 1 the same method as Preparation Example 1 was carried out, except that 30 parts by weight of methyl methacrylate was added instead of 45 parts by weight, and 55 parts by weight of glycidyl methacrylate was added instead of 40 parts by weight. An acrylic copolymer was obtained.
- methyl methacrylate was used at 30 parts by weight instead of 45 parts by weight, glycidyl methacrylate was used at 55 parts by weight instead of 40 parts by weight, and 2-ethylhexyl acrylate was used at 15 parts by weight instead of butyl acrylate at 15 parts by weight.
- An acrylic copolymer was obtained in the same manner as in Preparation Example 1 except that it was added as a part.
- methyl methacrylate was used at 55 parts by weight instead of 45 parts by weight
- glycidyl methacrylate was used at 20 parts by weight instead of 40 parts by weight
- 2-ethylhexyl acrylate was used at 25 parts by weight instead of butyl acrylate at 15 parts by weight.
- An acrylic copolymer was obtained in the same manner as in Preparation Example 1 except that it was added as a part.
- a commercially available copolymer (a copolymer of methyl methacrylate, butyl acrylate, glycidyl methacrylate, and styrene) was used in the production of masterbatch A described in Patent Document 1.
- Polybutylene adipate terephthalate (manufacturer: Xinjiang Blueridge Tunhe Chemical Industry, product name: TH801T) and polylactic acid (manufacturer: Natureworks, product name: Ingeo Biopolymer 2003D) were each dried at 60°C for 24 hours using an oven. .
- Example 1 a resin composition was obtained in the same manner as Example 1, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 1 was added instead of 0.3 parts by weight.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 2 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. A resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 3 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. A resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 4 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. A resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 5 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. A resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Preparation Example 6 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. A resin composition was obtained.
- Example 1 a resin composition was obtained in the same manner as Example 1, except that the acrylic copolymer obtained in Preparation Example 1 was not added.
- Example 1 a resin composition was produced in the same manner as in Example 1, except that 1.0 parts by weight of the copolymer of Comparative Preparation Example 1 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Comparative Preparation Example 2 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. Thus, a resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Comparative Preparation Example 3 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. Thus, a resin composition was obtained.
- Example 1 the same method as Example 1 was carried out, except that 1.0 parts by weight of the acrylic copolymer obtained in Comparative Preparation Example 4 was added instead of 0.3 parts by weight of the acrylic copolymer obtained in Preparation Example 1. Thus, a resin composition was obtained.
- the glass transition temperature, molecular weight, and epoxy equivalent weight were measured by the method below, and are shown in Table 1 below along with the monomer composition.
- Weight average molecular weight and number average molecular weight For the acrylic copolymer sample obtained above, the weight average molecular weight and number average molecular weight were measured using gel permeation chromatography (GPC: PL GPC220, Agilent Technologies) under the following conditions. was measured. At this time, a portion of the solution dissolved in the solvent Tetrahydrofuran (Stabilized with BHT) at a concentration of 2 mg/ml was used as the sample.
- GPC gel permeation chromatography
- Epoxy equivalent (g/eq) Using Bruker's 700MHz NMR spectrometer, measure the content ratio (molar ratio) of glycidyl methacrylate according to nuclear magnetic resonance spectroscopy and determine the equivalent number of epoxy groups (eq/mol) through this. was obtained, and the epoxy equivalent weight (g/eq) was calculated using the number average molecular weight (Mn) value measured above.
- melt index melt enthalpy ( ⁇ Hm)
- number and size of domains were measured in the following manner and are shown in Table 2 below.
- melt flow ratio (MFR): Using Gottfert's MI-4 melt flow indexer, the melt index of the obtained resin composition sample was measured according to ISO 1133 (190 °C, 5 kg).
- Example 1 11.3 0.4 70 480
- Example 2 6.9 0.2 105 280
- Example 3 6.7 0.2 100 282
- Example 4 7.6 0.3 90 400
- Example 5 5.0 0.1 125 210
- Example 6 4.8 0.1 135 200
- Example 7 10.6 0.5 60 600 Comparative Example 1 14.3 4.1 19 732 Comparative Example 2 0.0 0.2 107 230 Comparative Example 3 14.2 4.0 19 740 Comparative Example 4 14.2 4.0 20 710 Comparative Example 5 14.0 3.9 24 700
- the resin compositions prepared in Examples 1 to 7 of the present invention have a melt index in the range of 3.0 g/10 min to 13.5 g/10 min, and a melt enthalpy of 0.01 J/10 min. It was confirmed that the values ranged from g to 3.6 J/g, that there were 50 or more domains, and that the domain size was 650 nm or less.
- the resin compositions prepared in Comparative Examples 1 and 3 to 5 have a melt index exceeding 13.5 g/10 min, a melt enthalpy exceeding 3.6 J/g, the number of domains is 19 to 24, and the domain It was confirmed that the size was over 700 nm.
- Weight average molecular weight and molecular weight increase rate The weight average molecular weight of the obtained resin composition sample was measured using gel permeation chromatography (GPC, PL GPC220, Agilent Technologies) under the following conditions. At this time, the sample was used by taking a portion of a solution dissolved in the solvent Chloroform at a concentration of 1 mg/ml.
- Example 1 141,000 104 334 675
- Example 2 150,000 111 392 670
- Example 3 152,000 113 385 670
- Example 4 145,000 107 360 670
- Example 5 159,000 118 400 665
- Example 6 159,000 118 410 665
- Example 7 141,000 104 300 665 Comparative Example 1 135,000 100 230 670 Comparative Example 2 175,000 130 393 590 Comparative Example 3 135,000 100 233 670 Comparative Example 4 135,000 100 233 670 Comparative Example 5 138,000 102 243 670
- the resin composition of Comparative Example 2 which included the copolymer disclosed in Patent Document 1 as a compatibilizer, showed an increase in tensile strength due to a significant increase in weight average molecular weight compared to the resin composition prepared in Comparative Example 1 that did not contain a compatibilizer. , it was confirmed that the elongation was drastically reduced compared to the resin compositions of Examples 1 to 7 containing the same amount of acrylic copolymer.
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Abstract
Description
| 구분 | 단량체 조성 | 유리전이온도 | 중량평균 분자량 | 에폭시 당량9) | |||
| MMA1) | GMA2) | BA3) | 2-EHA4) | ||||
| (중량%) | (℃) | (g/mol) | (g/eq) | ||||
| 제조예 1 | 45.0 | 40.0 | 15.0 | - | 65 | 33,000 | 355 |
| 제조예 2 | 45.0 | 40.0 | - | 15.0 | 57 | 33,000 | 355 |
| 제조예 3 | 55.0 | 30.0 | 15.0 | - | 68 | 33,000 | 471 |
| 제조예 4 | 30.0 | 55.0 | 15.0 | - | 57 | 33,000 | 258 |
| 제조예 5 | 30.0 | 55.0 | - | 15.0 | 52 | 33,000 | 259 |
| 제조예 6 | 55.0 | 20.0 | - | 25.0 | 47 | 30,000 | 708 |
| 비교 제조예 1 | - | 54 | 6,800 | 285 | |||
| 비교 제조예 2 | 64.0 | 2.1 | 33.9 | - | 35 | 30,000 | 6,796 |
| 비교 제조예 3 | 62.3 | 5.2 | - | 32.5 | 34 | 30,000 | 2,712 |
| 비교 제조예 4 | 60.0 | 10.0 | 30.0 | - | 39 | 28,000 | 1,414 |
| 1) MMA: 메틸 메타크릴레이트 2) GMA: 글리시딜 메타크릴레이트 3) BA: 부틸 아크릴레이트 4) 2-EHA: 2-에틸헥실 아크릴레이트 |
|||||||
| 구분 | 용융지수 | 용융 엔탈피(△Hm) | 도메인 개수 | 도메인 크기 |
| (g/10 min) | (J/g) | (개) | (nm) | |
| 실시예 1 | 11.3 | 0.4 | 70 | 480 |
| 실시예 2 | 6.9 | 0.2 | 105 | 280 |
| 실시예 3 | 6.7 | 0.2 | 100 | 282 |
| 실시예 4 | 7.6 | 0.3 | 90 | 400 |
| 실시예 5 | 5.0 | 0.1 | 125 | 210 |
| 실시예 6 | 4.8 | 0.1 | 135 | 200 |
| 실시예 7 | 10.6 | 0.5 | 60 | 600 |
| 비교예 1 | 14.3 | 4.1 | 19 | 732 |
| 비교예 2 | 0.0 | 0.2 | 107 | 230 |
| 비교예 3 | 14.2 | 4.0 | 19 | 740 |
| 비교예 4 | 14.2 | 4.0 | 20 | 710 |
| 비교예 5 | 14.0 | 3.9 | 24 | 700 |
| 구분 | 중량평균 분자량 | 분자량 증가율 | 인장 강도 | 신율 |
| (g/mol) | (Index) | (kgf/cm2) | (%) | |
| 실시예 1 | 141,000 | 104 | 334 | 675 |
| 실시예 2 | 150,000 | 111 | 392 | 670 |
| 실시예 3 | 152,000 | 113 | 385 | 670 |
| 실시예 4 | 145,000 | 107 | 360 | 670 |
| 실시예 5 | 159,000 | 118 | 400 | 665 |
| 실시예 6 | 159,000 | 118 | 410 | 665 |
| 실시예 7 | 141,000 | 104 | 300 | 665 |
| 비교예 1 | 135,000 | 100 | 230 | 670 |
| 비교예 2 | 175,000 | 130 | 393 | 590 |
| 비교예 3 | 135,000 | 100 | 233 | 670 |
| 비교예 4 | 135,000 | 100 | 233 | 670 |
| 비교예 5 | 138,000 | 102 | 243 | 670 |
Claims (18)
- 연속상 및 분산상을 포함하고,상기 연속상은 제1 생분해성 수지를 포함하며,상기 분산상은 제2 생분해성 수지를 포함하고,ISO 1133에 따라 190 ℃에서 5 kg의 하중으로 측정한 용융지수가 3.0 g/10 min 이상 13.5 g/10 min 이하이고,투과전자현미경(TEM)을 이용하여 25,000 배율에서 촬영한 이미지에서 관찰되는 분산상의 도메인 개수가 35 개 이상인 수지 조성물.
- 제1항에 있어서,상기 제1 생분해성 수지는 지방족 폴리에스테르 단위 및 방향족 폴리에스테르 단위를 포함하는 것인 수지 조성물.
- 제1항에 있어서,상기 제1 생분해성 수지는 폴리부틸렌 아디페이트 테레프탈레이트를 포함하는 것인 수지 조성물.
- 제1항에 있어서,상기 제2 생분해성 수지는 폴리젖산을 포함하는 것인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 제1 생분해성 수지 및 제2 생분해성 수지의 합 100 중량부에 대하여, 제1 생분해성 수지를 50 중량부 이상 90 중량부 이하, 및 제2 생분해성 수지를 10 중량부 이상 50 중량부 이하의 함량으로 포함하는 것인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 ISO 1133에 따라 190 ℃에서 5 kg의 하중으로 측정한 용융지수가 4.5 g/10 min 이상 12.0 g/10 min 이하인 것인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 투과전자현미경(TEM)을 이용하여 25,000 배율에서 촬영한 이미지에서 관찰되는 분산상의 도메인 크기가 700 nm 이하인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 시차 주사 열량계(DSC)를 이용하여 8 mg(오차범위 1 mg)의 시료를 투입하고 질소 기류 하에서 180 ℃까지 10 ℃/min의 승온 속도로 1차 가열한 후, 10 ℃/min의 하온 속도로 -50 ℃까지 냉각하고, 180 ℃까지 10 ℃/min의 승온 속도로 2차 가열하여 측정한 용융 엔탈피(△Hm)가 0.01 J/g 이상 3.6 J/g 이하인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 수지 조성물 전체의 중량평균 분자량이 137,000 이상 200,000 이하인 것인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 ASTM D638에 따라 인장속도 50 mm/min으로 측정한 인장강도가 245 kgf/cm2 이상 500 kgf/cm2 이하인 것인 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 아크릴계 공중합체 및 상기 아크릴계 공중합체로부터 형성된 상용화부 중 적어도 하나 이상을 더 포함하는 것인 수지 조성물.
- 제11항에 있어서,상기 아크릴계 공중합체는 메틸 (메트)아크릴레이트 단량체 단위, 에폭시기를 포함하는 (메트)아크릴레이트 단량체 단위 및 탄소수 2 내지 10의 알킬 (메트)아크릴레이트계 단량체 단위를 포함하는 것인 수지 조성물.
- 제11항에 있어서,상기 아크릴계 공중합체는 메틸 (메트)아크릴레이트 단량체 단위 25 중량% 이상 65 중량% 이하, 에폭시기를 포함하는 (메트)아크릴레이트 단량체 단위 15 중량% 이상 60 중량% 이하 및 탄소수 2 내지 10의 알킬 (메트)아크릴레이트계 단량체 단위 5 중량% 이상 32 중량% 이하를 포함하는 것인 수지 조성물.
- 제11항에 있어서,상기 수지 조성물은 제1 생분해성 수지 및 제2 생분해성 수지의 합 100 중량부에 대하여, 상기 아크릴계 공중합체 및 상기 아크릴계 공중합체로부터 유도된 상용화부를 0.01 중량부 이상 10.0 중량부 이하의 함량으로 포함하는 것인 수지 조성물.
- 제11항에 있어서,상기 아크릴계 공중합체는 에폭시 당량(E.E.W)이 200 g/eq 이상 800 g/eq 이하인 것인 수지 조성물.
- 제11항에 있어서,상기 아크릴계 공중합체는 중량평균 분자량이 10,000 이상 100,000 이하인 것인 수지 조성물.
- 제11항에 있어서,상기 아크릴계 공중합체는 유리전이온도가 45 ℃ 이상 85 ℃ 이하인 것인 수지 조성물.
- 제1항 내지 제17항 중 어느 한 항에 따른 수지 조성물로부터 성형된 성형품.
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| EP4534601A1 (en) | 2025-04-09 |
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| US20250368816A1 (en) | 2025-12-04 |
| KR20230164562A (ko) | 2023-12-04 |
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| EP4534600A4 (en) | 2025-12-03 |
| CA3255694A1 (en) | 2025-06-14 |
| CA3255405A1 (en) | 2025-07-03 |
| AU2023274870A2 (en) | 2025-05-15 |
| EP4534602A4 (en) | 2025-12-24 |
| JP2025517455A (ja) | 2025-06-05 |
| WO2023229220A1 (ko) | 2023-11-30 |
| AU2023277095A1 (en) | 2024-12-05 |
| KR20230164563A (ko) | 2023-12-04 |
| CN119256048A (zh) | 2025-01-03 |
| EP4534600A1 (en) | 2025-04-09 |
| WO2023229219A1 (ko) | 2023-11-30 |
| JP2025517495A (ja) | 2025-06-05 |
| KR20230164564A (ko) | 2023-12-04 |
| EP4534601A4 (en) | 2025-12-10 |
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