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• W2054291242 abstract "Novel poly(arylene ether ketone) polymers with fluorophenyl pendants and phenoxide-terminated wholly sulfonated poly(arylene ether sulfone) oligomers are prepared via Ni(0)-catalyzed and nucleophilic polymerization, respectively, and subsequently used as starting materials to obtain graft-crosslinked membranes as polymer electrolyte membranes. The phenoxide-terminated sulfonated moieties are introduced as hydrophilic parts as well as crosslinking units. The chemical structure and morphology of the obtained membranes are confirmed by (1) H NMR and tapping-mode AFM. The properties required for fuel cell applications, including water uptake and dimensional change, as well as proton conductivity, are investigated. AFM results show a clear nanoscale phase-separation microstructure of the obtained membranes. The membranes show good dimensional stability and reasonably high proton conductivities under 30-90% relative humidity. The anisotropic proton conductivity ratios (σ(formula see text) ) of the membranes in water are in the range 0.65-0.92, and increase with an increase in hydrophilic block length. The results indicate that the graft-crosslinked membranes are promising candidates for applications as polymer electrolyte membranes." @default.
• W2054291242 created "2016-06-24" @default.
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• W2054291242 date "2011-06-13" @default.
• W2054291242 modified "2023-10-10" @default.
• W2054291242 title "Graft-crosslinked Copolymers Based on Poly(arylene ether ketone)-gc-sulfonated Poly(arylene ether sulfone) for PEMFC Applications" @default.
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• W2054291242 doi "https://doi.org/10.1002/marc.201100116" @default.
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