Thermal, vibrational and Ac impedance studies on proton conducting polymer electrolytes based on poly(vinyl acetate)

► IR analysis confirms the interaction between proton and ester oxygen of (PVAc). ► Polymer salt interaction in amorphous phase is confirmed by DSC analysis. ► Maximum ionic conductivity is observed for the sample 75 mol% PVAc:25 mol% HClO4. ► Temperature dependence of conductivity shows non-Arrhenius behavior.