- - SULFONIC ACID GROUP-CONTAINING POLYMER SULFONIC ACID GROUP-CONTAINING AROMATIC COMPOUND AND METHOD OF MAKING THE SAME AS WELL AS POLYMER ELECTROLYTE MATERIAL POLYMER ELECTROLYTE MOLDED PRODUCT AND SOLID POLYMER FUEL CELL USING THE SAME

摘要

It is an object of the present invention to provide a polymer electrolyte membrane which has excellent proton conductivity even under low humidification conditions and which is excellent in mechanical strength and chemical stability and which is capable of achieving high output and excellent physical durability in processing into a solid polymer fuel cell, A polymer electrolyte material, a polymer electrolyte molding product, and a solid polymer fuel cell using the same, as well as a polymer and a sulfonic acid group-containing aromatic compound. The sulfonic acid group-containing polymer of the present invention is a sulfonic acid group-containing polymer comprising a constituent unit (A1) containing a sulfonic acid group and a constituent unit (A2) containing no sulfonic acid group, wherein the polymer comprises at least one Contains a structural unit having a structure specified as the unit (A1) in an amount of 25 mol% or more based on the total of the structural unit (A1) containing a sulfonic acid group. In addition, the polymer electrolyte materials, polymer electrolyte molding products and solid polymer fuel cells of the present invention are constructed using such sulfonic acid group-containing polymers.