Krishnan, N. Nambi Lee, Hye-Jin Kim, Hyoung-Juhn Kim, Ju-Yong Hwang, Inchul Jang, Jong Hyun Cho, Eun Ae Kim, Soo-Kil Henkensmeier, Dirk Hong, Seong-Ahn Lim, Tae-Hoon 2024-01-20T19:02:07Z 2024-01-20T19:02:07Z 2021-09-02 2010-07 0014-3057 https://pubs.kist.re.kr/handle/201004/131294 Polymer blending is used to modify or improve the dimensional and thermal stability of any two different polymers or copolymers. In this study, both sulfonated polybenzimidazole homopolymer (MS-p-PBI 100) and sulfonated poly(aryl ether benzimidazole) copolymers (MS-p-PBI 50, 60, 70, 80, 90) were successfully synthesized from commercially available monomers. The chemical structure and thermal stability of these polymers was characterized by H-1 NMR, FT-IR and TGA techniques. Blend membranes (BMs) were prepared from the salt forms of sulfonated poly(ether sulfone) (PES 70) and MS-p-PBI 100 using dimethylacetamide (DMAc). These blend membranes exhibited good stability in boiling water. The blending of 1 wt.% of MS-p-PBI 100 and 99 wt.% of PES 70 to produce the blend membrane BM 1 reduced membrane swelling, thus leading to good dimensional stability and comparable proton conductivity. Hence, BM 1 was chosen for the fabrication of a membrane electrode assembly (MEA) for proton exchange membrane fuel cell (PEMFC) and direct methanol fuel cell (DMFC) applications. This paper reports on PEMFC and DMFC performance under specific conditions. (C) 2010 Published by Elsevier Ltd. English PERGAMON-ELSEVIER SCIENCE LTD ACID-DOPED POLYBENZIMIDAZOLE PROTON-EXCHANGE MEMBRANES POLYMER ELECTROLYTE MEMBRANES PHOSPHORIC-ACID CONDUCTING MEMBRANES POLY(2,5-BENZIMIDAZOLE) PERFORMANCE PBI Sulfonated poly(ether sulfone)/sulfonated polybenzimidazole blend membrane for fuel cell applications Article 10.1016/j.eurpolymj.2010.03.005 1 EUROPEAN POLYMER JOURNAL, v.46, no.7, pp.1633 - 1641 EUROPEAN POLYMER JOURNAL 46 7 1633 1641 scie scopus 000280079300024 2-s2.0-77953613907 Polymer Science Polymer Science Article ACID-DOPED POLYBENZIMIDAZOLE PROTON-EXCHANGE MEMBRANES POLYMER ELECTROLYTE MEMBRANES PHOSPHORIC-ACID CONDUCTING MEMBRANES POLY(2,5-BENZIMIDAZOLE) PERFORMANCE PBI Polymer electrolyte fuel cells Polymer blends Proton exchange membrane Sulfonated poly(ethersulfone) Sulfonated polybenzimidazole