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Procede de preparation de pellicules en polyethylene presentant une resistance elevee a la traction et un module eleve, pellicules de polyethylene obtenues par ce procede et articles prepares a partir de ces pellicules
Processo para preparar uma mistura de 1,4-butanodiol e 2-alquil-1,4-butanodiol;processo para preparar 2-alquil-1,4-butanodiol;processo para preparar uma mistura de tetraidrofurano e 3-alquiltetraidro-furano;processo para preparar um copolimero de tetraidrofurano e 3-alquiltetraidrofurano