Transport Properties of Polyimides Derived from Benzophenonetetracarboxylic Dianhydride and Other Diamines
作者： Yu N Lazareva , MN Vidyakin , A Yu Alentiev , M Yu Yablokova , AA Kuznetsov
DOI: 10.1134/S0965545X09100034
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摘要: Gas-separating membrane characteristics of polyimide films composed the common fragment benzophenone-3,3′,4,4′-tetracarboxylic dianhydride and diamines varying structure were studied. Permeability coefficient P, diffusion D, solubility S for H2, CO, CO2, CH4 determined. The derived from m-phenylenediamine exhibited best gas-separating properties. A relationship between chain rigidity, free volume, transport parameters (P, S, selectivity) was established on basis data. It shown that there is an optimal rigidity studied polyimides results in polymer structurization during film preparation corresponds to high separation selectivity.
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