Substituted polyacetylene copolymer

摘要

The invention provides a novel substituted polyacetylene copolymer having an outstandingly large oxygen permeation coefficient of 6x10-8 cm3(STP)xcm/cm2xsecxcmHg or larger and a separation factor between oxygen and nitrogen of 2.0 or larger along with a high tensile strength of 200 kg/cm2 or larger in the form of a film and useful as a gas permeation element in the separation or enrichment of oxygen from or in air. The copolymer is obtained by the copolymerization of 1-trimethylsilyl-1-propyne and 1-(1',1',3',3'-tetramethyl-1',3'-disilabutyl)-1-propyne in a molar ratio of 30:70 to 95:5 and the copolymer should preferably have a number-average molecular weight of at least 1x104.