abstract |
Provided are a solid polymer electrolyte having improved heat resistance and excellent proton conductivity, and a proton conducting membrane comprising the electrolyte. A copolymer having a sulfonic acid group, comprising a repeating unit represented by the following general formula (1). [Chemical 1] Wherein Y is —CO—, —SO 2 —, —SO—, —CONH—, —COO—, — (CF 2 ) 1 — (l is an integer of 1 to 10), —C (CF 3) 2 -, represents at least one structure selected from the group consisting of, W is a direct bond, -CO -, - SO 2 - , - SO -, - CONH -, - COO -, - (CF 2 ) l - (l is an integer of 1 to 10), - C (CF 3) 2 -, - O -, - represents at least one structure selected from the group consisting of S-, Z is a direct bond Or, from the group consisting of — (CH 2 ) 1 — (l is an integer of 1 to 10), —C (CH 3 ) 2 —, —O—, —S—, —CO—, —SO 2 —. R 30 represents —SO 3 H or —O (CH 2 ) h SO 3 H or —O (CF 2 ) h SO 3 H (h is an integer of 1 to 12). Represented A nitrogen-containing aromatic ring having a substituent, p is an integer of 0 to 10, q is an integer of 0 to 10, r is an integer of 1 to 5, and k is an integer of 0 to 4. Show.) |