Pervaporation and gas separation membranes made from polyimide/polydimethylsiloxane block copolymer |
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Authors: | Jan Schauer,Petr Sysel,Vladimí r Marous̆ ek,Zbynĕ k Pientka,Jir̆ í Pokorný ,Miroslav Bleha |
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Abstract: | Polyimide/polydimethylsiloxane block copolymers were prepared from oligoimides based on 2-aminopyridine-terminated 3,3′-oxybis(phthalic anhydride) and 1,4-bis(4-amino-α, α-dimethylbenzyl)benzene, and 3-aminopropyl-terminated oligo(dimethylsiloxane)s. Selectivity of homogeneous membranes prepared from the copolymers depends on the polydimethylsiloxane (PDMS) content: Selectivity of copolymers with up to approximately 20 wt % of PDMS is similar to that of polyimide homopolymer, whereas selectivity of copolymers containing more than 20 wt % of PDMS resembles that of pure PDMS. © 1996 John Wiley & Sons, Inc. |
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