| 초록 |
Cross-linked poly(2,5-benzimidazole) (C-ABPBI) membranes were prepared by a reaction between three-arm poly(2,5-benzimidazole)s with three carboxylic acid end groups (T-ABPBI) and 3,3’-diaminobenzidine (DABI) in poly(phosphoric acid) (PPA) during the casting process. The cross-linking reaction improved the chemical and thermal stabilities of the host polymer, poly(2,5-benzimidazole) (ABPBI). Consequently, the C-ABPBI membranes showed higher proton conductivity values than the linear polymer membranes. For example, the C-ABPBI-50 membrane could contain a PA content ＞ 84 wt.% with a proton conductivity of 0.12 S cm-1 at 150 oC under non-humidified conditions. |
