There were two obvious transitions on the dynamic mechanical spectrum for the comblike polymer based on methylvinyl ether /maleic anhydride alternating copolymer backbone and on polyethylene oxide side chains(CBP) and its CF3SO3 Li complex.α transition was assigned to main chain glass transition.The initial α glass transition temperatures were dependent upon salt content and all below 25℃

the β transition was assigned to glass transition of polyethylene exide short side chain.And the β glass transition temperature (Tβ)increased with the increasing of salt content.The relation between the conductivity (σ)and salt content (or Li/EO ratio)showed two peaks

which were corresponding to the minimums of Ta. The relation between σand temperature followed the VTF eguetion.Turn of the linear relationship was believed that the α-glass transition was responsible for it.