METHOD FOR PRODUCING SULFONATED POLYMER FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a sulfonated polymer film, having excellent productivity, capable of substantially reducing production cost and developing characteristics useful as the film for fuel cells.

SOLUTION: Sulfonation of the polymer film is attained by continuously immersing a film composed of an aromatic polymer compound into a reacting tank in which a sulfonating agent is included and a solvent (preferably a halogenated hydrocarbon-based compound, more preferably having ≥3 carbon numbers) is preferably included.

COPYRIGHT: (C)2004,JPO