PMDA-ODA-PSX-DABSA COPOLYMER FOR IONIC-CONDUCTION

A quaternary copolymer, containing 1,2,4,5-benzene tetracarboxylic dia nhydride (PMDA), 4-aminophenyl ether (ODA), aminopropyldimethyl termin ated polydimethylsiloxane (PSX) and 2,5-diaminobenzene sulfonic acid ( DABSA), has been successfully synthesized to become an ionic conductor for electrochemical applications. It combines the functions of immobi lized anionic groups (SO3-) incorporated into polyimide to increase mo bile cation concentration and of PSX introduced to enhance ionic condu ctivity via flexible chain motion assistance. As a result, an improvem ent of multiple orders of magnitude for conductivity from each functio n has been achieved by this copolymer. These conductivities are also c onfirmed to be of an ionic nature.