SILICON-CONTAINING POLYPYRROLONE FOR GAS-SEPARATION APPLICATION

The permeability to H-2, O2, and N2 of silicon-containing polypyrrolon e (SiDA-OTA) and three silicon-containing polypyrrolone random copolym ers was determined at 30-degrees-C and 1 atm. The SiDA-OTA shows simul taneously increased permeability and permselectivity over the analogou s polyimide (SiDA-ODA). The substitution of SiDA for the BPDA moiety i n a polypyrrolone appears to result in a significant increase in gas p ermeability. The random copolymers contain different amounts of SiDA a nd DODA, which show lower permeability and higher permselectivity than does SiDA-OTA. Wide-angle X-ray diffraction measurements of the mean intersegmental distance of the materials characterized the packing of different polymer types. (C) 1994 John Wiley & Sons, Inc.