GAS TRANSPORT PROPERTIES OF A POLYIMIDE BASED ON 2,2-BIS (3,4-DECARBOXYPHENYL)HEXAFLUOROPROPANE AND meta-PHENYLENEDIAMINE

• 来源期刊: 高分子科学（英文版）
• 学科: 化学
• 年，卷（期）: 1998,（1）
• 页码范围: 86-90
• 页数: 5页
• 分类号: O6
• 语种: 英文

摘要

By means of a vacuum time-lag method, gas transport properties of a polyimide based on 2,2-bis(3,4-decarboxyphenyl) hexafluoropropane dianhydride (6FDA)and meta-phenylenediamine (mPDA) have been measured as a function of upstream pressure and temperature. The results show that no gas-induced plasticization occurs for this polyimide in the upstream pressure range from 1 atm to 20 atm. The temperature dependence of P and D can be described by the Arrhenius equations. The activation energies of permeation and diffusion were obtained for the gas/polymer pair studied and correlated with the size of penetrant gas.