Synthesis, characterization and ionic conductivity of solid polymer electrolytes based on modified alternating maleic anhydride copolymer with oligo(oxyethylene) side chains

Abstract

Three comb polymers (CP) based on modified alternating methyl vinyl ether/maleic anhydride copolymer with oligo-oxyethylene side chains of the type O(CH 2CH 2O) n CH 3 were synthesized and characterized, and the ionic conductivity of CP/salt complexes is reported. The conductivity of these complexes was about 10 −5-10 −6 S cm −1 at room temperature. The conductivity, which displayed non-Arrhenius behaviour, was analysed using the Vogel—Tammann—Fulcher equation. The conductivity maxima appear at lower salt concentration, when CP has longer side chains. Infrared (i.r.) was used to study the cation—polymer interaction. I.r. results also indicate that the ester in CP might decompose at 140°C and reproduce the maleic anhydride ring.