Patent Number: 7,714,027

Title: Crosslinked aromatic polymer electrolyte membrane and method for producing same

Abstract: An aromatic polymer film substrate, or a grafted aromatic polymer film substrate having a monomer introduced therein as graft chains is irradiated with ionizing radiation to impart a crosslinked structure. The aromatic polymer film substrate or the grafted aromatic polymer film substrate, provided with the crosslinked structure, is directly sulfonated to obtain a crosslinked aromatic polymer electrolyte membrane. The crosslinked aromatic polymer electrolyte membrane has low water uptake, high proton conductivity, low methanol permeability, high chemical stability, and excellent mechanical characteristics. A method for producing the crosslinked aromatic polymer electrolyte membrane is also provided.

Inventors: Chen; Jinhua (Takasaki, JP), Maekawa; Yasunari (Takasaki, JP), Asano; Masaharu (Takasaki, JP), Yoshida; Masaru (Takasaki, JP)

Assignee: Japan Atomic Energy Agency

International Classification: C08J 5/20 (20060101)

Expiration Date: 5/11/12018