IONIC-CONDUCTIVITY OF SOLID POLYMER ELECTROLYTES BASED ON MODIFIED ALTERNATING MALEIC-ANHYDRIDE COPOLYMER WITH OLIGO(OXYETHYLENE) SIDE-CHAINS

Comb-like polymers (CP) based on modified alternating methyl vinyl eth er/maleic anhydride copolymer with oligo-oxyethylene side chains of th e type -O(CH2CH2O)(n)CH3 have been synthesized and characterized, and complexed with lithium salts to form amorphous polymer electrolytes. C P/salt complexes showed conductivity up to 10(-5)Scm(-1) at room tempe rature. The temperature dependence of ionic conductivity suggests that the ion transport is controlled by segmental motion of the polymer, s hown by linear curves obtained in Vogel-Tammann-Fulcher plots. The ion ic conductivity maximum moves to a higher salt concentration as the te mperature increases. IR results indicate that the ester in CP might de compose at 140 degrees C and reproduce the maleic anhydride ring.