BLOCK COPOLYMER, MANUFACTURING METHOD THEREFOR, AND POLYMER ELECTROLYTE MATERIAL, POLYMER ELECTROLYTE FORM ARTICLE, AND POLYMER ELECTROLYTE FUEL CELL USING THE BLOCK COPOLYMER

摘要

Provided are: a block copolymer that exhibits excellent proton conductivity even in low-humidification conditions, exhibits excellent mechanical strength and chemical stability, and when used in a solid-polymer fuel cell, allows high output and excellent physical durability; a polymer electrolyte material; and a molded polymer electrolyte and solid-polymer fuel cell using same. This block polymer contains at least one of each of the following: a segment (A1) containing an ionic group; a segment (A2) that does not contain an ionic group; and a linker moiety connecting said segments. This block polymer is characterized in that the segment (A1) containing an ionic group contains a constitutional unit represented by a specific structure. This polymer electrolyte material, molded polymer electrolyte, and solid-polymer fuel cell are characterized by the use of this block copolymer.