STUDY ON THE 2 CLASS GLASS-TRANSITION AND ION-TRANSPORT OF A COMB POLYMER ELECTROLYTE

The thermal behaviour and ion-transport properties of a comb polymer e lectrolyte CP350/LiSCN based on methyl vinyl ether/maleic anhydride co polymer with oligo-oxyethylene side chains were studied by means of DS C and ac impedance method. The two glass transition temperatures which can be attributed to side chains and main chains respectively were fo und to increase with increasing salt concentration. Conductivities whi ch displayed non-Arrhenius behaviour were analyzed by using Vogel-Tamm ann-Fulcher equation and interpreted on the basis of the configuration al entropy model derived by Gibbs and coworkers. The optimum ionic con ductivity at 25 degrees C achieved was 2.19x10(-5)S/cm.