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

摘要

The present invention provides: a novel polyimide containing a diamine component having a fluorene backbone; and a novel polyimide polymer electrolyte membrane containing the polyimide as the principal component thereof, and having properties (for example, high methanol permeation resistance) based on the polyimide. This polyimide contains a constitutional unit (P) that is represented by formula (1). This polyimide polymer electrolyte membrane contains this polyimide as the principal component thereof.