Abstract Homogeneous blend membranes of polynorbornene and 2,2′-bis(3,4′-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA)-durene were prepared to improve H2 permselectivity. The thermal properties and gas permselectivity of membranes with different polynorbornene/6FDA-durene blending ratios were investigated. The structural changes due to blending result in increased permeability derived from an increase in the fractional free volume of polymer blends with increasing glass transition temperature. Moreover, an increase in the 6FDA-durene content in the blends improved gas permeation, diffusivity, and solubility. The prepared blend membranes showed excellent gas permeation properties, namely, high gas permeability for H2 (14–971 Barrer) and high H2/N2 (α = 13–46) and H2/CO (α = 10–29) permselectivities.

中文翻译：

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通过混合 6FDA-杜烯来调节聚降冰片烯基膜的自由体积以提高 H 2 渗透选择性

摘要 制备了聚降冰片烯和 2,2'-双(3,4'-二羧基苯基)六氟丙烷二酐 (6FDA)-杜烯的均相共混膜以提高 H2 渗透选择性。研究了具有不同聚降冰片烯/6FDA-杜烯混合比例的膜的热性能和气体渗透选择性。由于共混物的结构变化导致渗透率增加，这是由于聚合物共混物的部分自由体积随着玻璃化转变温度的增加而增加。此外，混合物中 6FDA-杜烯含量的增加改善了气体渗透性、扩散性和溶解性。制备的混合膜显示出优异的气体渗透性能，即对 H2 (14-971 Barrer) 的高气体渗透率和高 H2/N2 (α = 13-46) 和 H2/CO (α = 10-29) 渗透选择性。