Method for preparing partially sulfonated polyphenylene sulfone and PEM membrane assembly having a catalyst-coated membrane.

Abstract

The invention relates to a method (100) for preparing a reagent for the partial sulfonation of polyphenylene sulfone comprising the following steps: S1: Introducing polyphenylene sulfone into sulfuric acid to at least the solubility limit, and S2: Separating the undissolved components to obtain the reagent. The invention further relates to a method for preparing partially sulfonated polyphenylene sulfone (1), a method (400) for producing a catalyst-coated membrane (10) for an electrochemical cell, and a PEM membrane assembly having a catalyst-coated membrane (10).METHOD FOR PREPARING PARTIALLY SULFONATED POLYPHENYLENE SULFONE AND PEM MEMBRANE ASSEMBLY HAVING A CATALYST-COATED MEMBRANE ABSTRACT The invention relates to a method (100) for preparing a reagent for the partial sulfonation of polyphenylene sulfone comprising the following steps: S1: Introducing polyphenylene sulfone into sulfuric acid to at least the solubility limit, and S2: Separating the undissolved components to obtain the reagent. The invention further relates to a method for preparing partially sulfonated polyphenylene sulfone (1), a method (400) for producing a catalyst-coated membrane (10) for an electrochemical cell, and a PEM membrane assembly having a catalyst-coated membrane (10).