Authors Mistri, E. A. ; Mohanty, A. K. ; Banerjee, S. ; Komber, H. ; Voit, B.
Title Naphthalene dianhydride based semifluorinated sulfonated copoly(ether imide)s: Synthesis, characterization and proton exchange properties
Date 15.08.2013
Number 35443
Abstract A series of semifluorinated sulfonated copoly(ether imide)s (co-SPI) was synthesized by one pot high temperature polycondensation reaction using a sulfonated diamine, 4,4'-diaminostilbene-2,2'-disulfonic acid (DSDSA), 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and a fluorinated quadri diamine (QA). The structures of the resulting co-SPIs were investigated by FTIR and NMR spectroscopy. The polymers had high molecular weight and gave tough, flexible and transparent membranes. Oxidative stability of the membranes was improved by introducing trifluoromethyl substituents in the copolymer structure and the copolymers also exhibited superior mechanical property higher than many other SPIs. The co-SPI membrane showed significantly high proton conductivity and low activation energy in water medium. Microscopic analyses revealed that well-dispersed hydrophilic domains contribute to better proton conducting properties.
Publisher Journal of Membrane Science
Citation Journal of Membrane Science 441 (2013) 168-177
Tags fluorinated co-poly(ether imide)s transmission electron microscopy proton conductivity activation energy fuel-cell applications polymer electrolyte membranes polyimide copolymers ether ketone conductivity acid stability operation

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