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- W1974257147 abstract "Two novel cross-linked anion exchange membranes (AEMs) for alkaline fuel cells (AFCs) were synthesized via nucleophilic substitution reactions. Brominated poly(2,5-bis(perfluorophenyl)-1,3,4-oxadiazole-co-allyl bisphenol), called as precursory polymer (PP), was synthesized by reaction of 2,5-bis(2,3,4,5,6-pentafluorophenyl)-1,3,4-oxadiazole (FPOx) and diallyl bisphenol A (DABPA) followed by bromination. Ethanediamine (EDA) and propane diamine (PDA) were introduced to PP to obtain cross-linked polymers EDA-PP and PDA-PP, respectively. The reactions between PP and diamines rolled the crosslinking and functionalizing process in one. The crosslinking process enhanced the thermal and mechanical stabilities of EDA-PP and PDA-PP, which were affected by the length of alkyl chains of diamines. Meanwhile, the conjugated system of PP extended the electron clouds around the amine groups, which improved the thermal stability and alkaline durability of quaternary ammonium (QA) groups. The solution casting membranes of EDA-PP and PDA-PP showed high ionic conductivities. The swelling ratios, TGA and AFM properties of the membranes also demonstrated their good mechanical and thermal stabilities." @default.
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- W1974257147 date "2014-08-01" @default.
- W1974257147 modified "2023-10-10" @default.
- W1974257147 title "Novel cross-linked anion exchange membranes with diamines as ionic exchange functional groups and crosslinking groups" @default.
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- W1974257147 doi "https://doi.org/10.1016/j.ijhydene.2014.03.122" @default.
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