Zhi‐Kang Xu, Christine Dannenberg, J. Springer
Jul 17, 2002
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Journal
Chemistry of Materials
Abstract
Polymers containing fluorene moieties are interesting because of their potential applications as photoelectronic materials and as gas separation membranes. In this work, the gas transport properties of two novel poly(arylene ether)s, one containing diphenylfluorene (FBP) and 2,6-bis(trifluoromethylphenylene)pyridine (6FPPr) groups and the other containing FBP and 2,5-bis(3-trifluoromethylphenylene)thiophene (6FPT) groups in the main chain, were investigated. The influence of temperature on permeability, diffusivity, and selectivity is reported at temperatures from 30 to 65 °C. Activation energies of permeation and diffusion for He, H2, CO2, O2, N2, and CH4 were obtained for the diphenylfluorene-containing polymers. It was found that the two FBP-containing poly(arylene ether)s studied here show higher gas permeabilities than most of the reported FBP-containing polymer membranes. A comparison revealed that the replacement of the thiophenylidene group with the pyridinylidene has an obvious influence on the g...