CONDUCTIVITY MEASUREMENTS OF LITFSI TRIBLOCK COPOLYMERS WITH A CENTRAL POE SEQUENCE

A-B-A block copolymers were prepared by the addition of styrene oxide or allyl glycidyl ether (AGE) monomers to oligo poly(oxyethylene) alpha,omega-dialcoholates. While the PEO central block should provide good conductivity at room temperature, the lateral blocks should ensure the mechanical properties. Although an improvement in mechanical properties is obtained by the addition of poly(-oxystyrene) (POS) sequences as expected, the conductivity decreases. The addition of small amounts of AGE units to the POE block, followed by free-radical curing of the allylic double bonds, results in the enhancement of the electrolyte strength. Good conductivities are observed already at room temperature.