Synthesis of Aromatic Polysulfonates by Interfacial Polycondensation Using Quaternary Ammonium Salts as Phase-Transfer Catalysts

Abstract

Aromatic polysulfonates of high molecular weights have been prepared from aromatic disulfonyl chlorides and sodium salts of bisphenols by the interfacial polycondensation in methylene chloride-water system using quaternary ammonium salts as a phase-transfer catalyst. Aromatic polysufonates obtained were soluble in a wide range of solvents including methylene chloride and tetrahydrofuran. Thermogravimetry showed that these polymers began to decompose around 300°C both in air and nitrogen atmospheres.