Abstract
This article presents literature data regarding the synthesis and properties of some sulfonated aromatic polymers, such as polyethersulfones, poly(etherketone)s, polybenzimidazoles, polyimides, which can be used for proton-exchange membrane in fuel cell applications. The polymers were prepared by two procedures: postsulfonation of existing polymers and direct copolymerization of sulfonated monomers. Some characteristics of the sulfonated polymers in correlation with their structure were also presented. Key words: sulfonation, sulfonated polymers, good solubility, thermal properties