| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorosulfonated ionomer suitable for production of a film usable in an electrolytic field. SOLUTION: This cross-linked fluorosulfonated ionomer comprises (A) a monomer unit derived from one or more fluorinated monomers having at least one ethylenic unsaturation, and (B) a fluorinated monomer unit containing a sulfonyl group -SO2F in an amount causing 380-1,300 g/eq equivalent, and has 380-1,300 g/eq equivalent. |
