Abstract
Extremely high gas-permeable polymers were synthesized via the metathesis copolymerization of 1-(3,4-difluorophenyl)-2-(4-trimethylsilylphenyl)acetylene (FS) and 1-(3,4-dichlorophenyl)-2-(4-trimethylsilylphenyl)acetylene (CS). The PO2 values of the copolymers (PFCS) were determined to be 5,600–14,000 barrer. It was found that desilylation remarkably enhanced the gas permeability, with the obtained desilylated membranes (DPFC) exhibiting ultrahigh oxygen permeabilities of 8,300–25,100 barrer, which are the highest among existing polymer materials. The effects of physical aging on the PO2 values of PFCS and DPFC were fairly small, thereby indicating their good stabilities.
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