Polymer electrolyte membrane composed of aromatic polymer membrane base and method for producing the same

摘要

Disclosed is a polymer electrolyte membrane which is characterized by being produced by a process wherein a vinyl monomer is introduced as a graft chain into an aromatic polymer membrane base, which is typified by a polyether ether ketone, polyether imide or polysulfone, by graft polymerization and then a part of the graft chain or/and the aromatic polymer chain is chemically converted into a sulfonic acid group. Also disclosed is a method for producing such a polymer electrolyte membrane.