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Counter‐Anion Effect on the Properties of Anion‐Conducting Polymer Electrolyte Membranes Prepared by Radiation‐Induced Graft Polymerization
Author(s) -
Koshikawa Hiroshi,
Yoshimura Kimio,
Sinnananchi Warapon,
Yamaki Tetsuya,
Asano Masaharu,
Yamamoto Kazuya,
Yamaguchi Susumu,
Tanaka Hirohisa,
Maekawa Yasunari
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300225
Subject(s) - etfe , tetrafluoroethylene , potassium hydroxide , polymer chemistry , membrane , chemistry , hydroxide , polymerization , electrolyte , polymer , bicarbonate , inorganic chemistry , copolymer , organic chemistry , biochemistry , electrode , layer (electronics)
Graft‐type anion‐conducting polymer electrolyte membranes (AEMs) are prepared by the radiation‐induced graft polymerization of chloromethylstyrene into poly(ethylene‐ co ‐tetrafluoroethylene) (ETFE) films and subsequent quaternization with trimethylamine. AEMs in the hydroxide form (AEM‐OH) are prepared by immersing the chloride form (AEM‐Cl) in 1 M potassium hydroxide (KOH) solution, followed by KOH and washing with nitrogen‐saturated water to prevent bicarbonate formation (AEM‐HCO 3 ). The AEM‐OH shows conductivity and water uptake four and two times higher than AEM‐Cl and ‐HCO 3 and is thermally and chemically less stable, resulting in the tendency to absorb water and to convert to the bicarbonate form.