POLYIMIDE, POLYIMIDE POLYMER ELECTROLYTE MEMBRANE, MEMBRANE-ELECTRODE ASSEMBLY, AND SOLID POLYMER FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide: a novel polyimide containing a diamine component having a fluorene backbone that includes a sulfonic acid group or a derivative thereof; and a novel polyimide polymer electrolyte membrane containing the polyimide as the principal component thereof, and having properties (for example, a good balance between methanol permeation resistance and proton conductivity) based on the polyimide.

SOLUTION: The polyimide contains a constitutional unit (P) that is represented by formula (1).

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