PROTON TRANSPORTING MATERIAL, ION EXCHANGER USING THE SAME, MEMBRANE ELECTRODE ASSEMBLY, FUEL CELL, SULFONIC ACID TYPE LIQUID CRYSTAL POLYMER MATERIAL, AND MATERIAL HAVING PHOSPHONIC ACID GROUP

摘要

PROBLEM TO BE SOLVED: To provide a proton transporting material having excellent proton transporting property by setting phase transition temperature at 200°C or below to make the sulfonic group hard to leave and setting to express a crystal phase at low temperature, and having an excellent mechanical property, especially suitable for electrolyte membrane of fuel cell, and to provide a use and raw material for producing the proton transporting material.

SOLUTION: The problem is solved by the proton transporting material obtained by mixing a sulfonic acid type liquid crystal polymer material and a material having a phosphonic acid group as indispensable materials. The proton transporting material which has been prepared by adding and mixing a material having a mesogenic group and a phosphonic acid group with a specific molecular structure to a sulfonic acid type liquid crystal polymer material having a mesogenic group and a specific molecular structure, is preferred.

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