An efficient synthetic strategy for high performance polysulfone: ionic liquid/zwitterion as reaction medium

Herein we report the novel use of ionic liquid (IL)/zwitterion (ZI) as a reaction medium for the efficient synthesis of polysulfones (PSFs) with high molecular weight and high yield. The results showed that ZI can significantly improve the solubility of 2,2-bis(4-hydroxyphenyl) propane (bisphenol A), and an intermediate sulphonic-type IL with high acidity was formed by ZI and bisphenol A, resulting in 80% reduction in dehydration time compared with conventional methods.