Synthesis and characterization of a series of high sulfonated poly(ether ether ketone)s

A series of high sulfonated poly(ether ether ketone)s were prepared by copolymerization of sodium 5,5 ' -carbonylbis (2-fluorobenzenesulfonate)(2),4,4 ' -difluorobenzophenone (1) and bisphenol A(3) in the presence of potassium carbonate in dimethylsulfoxide. The copolymers were characterized by IR and DSC, The influence of degree of sulfonation on the properties of copolymers, such as component, thermal stability, solubility and filming ability, was studied.