Aromatic sulfonic acid derivatives, sulfonic acid group-containing polymers, block copolymers, polymer electrolyte materials, polymer electrolyte molded articles, and solid polymer fuel cells

摘要

Excellent proton conductivity even under low humidification conditions, excellent mechanical strength and chemical stability, and achieves high output and excellent physical durability when used as a polymer electrolyte fuel cell. Aromatic sulfonic acid derivatives and sulfonic acid group-containing polymers are provided. The aromatic sulfonic acid derivative of the present invention is an aromatic sulfonic acid derivative having a specific structure, and is characterized in that a sulfonic acid group is introduced into more than 50% of the phenyl groups of the total phenyl groups. The sulfonic acid group-containing polymer of the present invention is characterized by being polymerized using such an aromatic sulfonic acid derivative, and having a specific structure.