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- W2775921419 abstract "Typical perfluorinated ionomers used in hydrogen fuel cells (FCs) are copolymers composed of a poly(tetrafluoroethylene) with perfluoropolyether pendant side chains terminated by sulfonic groups. The chemical stability of Nafion and other proton exchange membranes (PEMs) used in FCs was carried out under both ex situ and in situ conditions. The chapter presents the studies of the stability of Nafion, chemically stabilized Nafion (CSNafion), Aquivion, and 3 M ionomers dispersions exposed to hydroxyl radicals, using the competitive kinetics (CK) approach. The CK approach that has been adapted for ranking the membrane stability led to the determination of the reaction rate constant between hydroxyl radicals and the ionomers. Chemical stabilization of Nafion significantly decreases the number of reactive end groups and reduces the susceptibility of the ionomer backbone to hydroxyl radicals attack. The electron spin resonance (ESR) spectra detected in Nafion, 3 M, and Aquivion membrane dispersions exposed to hydroxyl radicals at pH 7." @default.
- W2775921419 created "2018-01-05" @default.
- W2775921419 creator A5060118895 @default.
- W2775921419 creator A5063287358 @default.
- W2775921419 date "2017-12-29" @default.
- W2775921419 modified "2023-10-14" @default.
- W2775921419 title "Ranking the Stability of Perfluorinated Membranes to Attack by Hydroxyl Radicals" @default.
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- W2775921419 doi "https://doi.org/10.1002/9781119196082.ch3" @default.
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