Hink, Steffen Elsoe, Katrine Cleemann, Lars Nilausen Henkensmeier, Dirk Jang, Jong Hyun Kim, Hyoung-Juhn Han, Jonghee Nam, Suk-Woo Li, Qingfeng 2024-01-20T05:34:28Z 2024-01-20T05:34:28Z 2021-09-05 2015-11 0014-3057 https://pubs.kist.re.kr/handle/201004/124807 Udel polysulfone based membranes with 4-aminopyridine pendant groups and cross-linking imidazole units are synthesized in a simple two step reaction. The ratio of 4-aminopyridine and imidazole is varied and the materials are extensively characterized. The average phosphoric acid uptake (in 85 wt% PA) ranges between 90 wt% and 452 wt% depending on the ratio of 4-aminopyridine and imidazole and the membranes show good proton conductivity of up to 65 mS cm(-1) at 160 degrees C under non-humidified conditions. The applicability of these materials as a polymer electrolyte membrane was proven by single cell tests at 130 degrees C. The relationships between PA uptake, chemical composition and mechanical stability are reported. Proton conductivity and mechanical properties only depend on the phosphoric acid content, which, however is a function of the chemical composition. (C) 2015 Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. Phosphoric acid doped polysulfone membranes with aminopyridine pendant groups and imidazole cross-links Article 10.1016/j.eurpolymj.2015.08.026 1 European Polymer Journal, v.72, pp.102 - 113 European Polymer Journal 72 102 113 N scie scopus 000364250000011 2-s2.0-84941560603 Polymer Science Polymer Science Article FUEL-CELLS POLYMER ELECTROLYTE POLYBENZIMIDAZOLE MEMBRANES PBI CONDUCTIVITY BLENDS PEMFC High temperature polymer electrolyte membrane fuel cell (HT-PEMFC) Udel polysulfone Aminopyridine