Citation: XU Zhikang, XU Youyi, Springer Jürgen. GAS TRANSPORT PROPERTIES OF A POLYIMIDE BASED ON 2, 2-BIS (3, 4-DECARBOXYPHENYL) HEXAFLUOROPROPANE AND meta-PHENYLENEDIAMINE[J]. Chinese Journal of Polymer Science, ;1998, 16(1): 86-90. shu

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

Received Date: 19 January 1997

By means of a vacuum time-lag method, gas transport properties of apolyimide based on 2, 2- bis (3, 4- decarboxyphenyl ) hexafluoropropane dianhydride (6FDA )and meta- phenylenediamine (mPDA ) have been measured as a function of upstream pres-sure and temperature. The results show that no gas-induced plasticization occurs for thispolyimide in the upstream pressure range from 1 atm to 20atm. The temperature depen-dence 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.
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