Elastomeric comb-shapd high molecular mass poly(oxyethylene) for polymer electrolyte:morphology and ionic conductivity

摘要

The morphology,dynamic mechanical properties and ionic conductivity of high molecular mass comb-shaped poly(oxyethylene)s with tri(oxyethylene) side chains (TECs) were investigated when LiClO_4 was doped at the concentration of [Li]/[-O-]=0.05approx0.15.The contents of tri(oxyethylene) side chain of TECs were 11mol% and 18mol% for TEC-11 and TEC-18,respectively.The high molecular mass over 10~6 of TECs gave rubbery electrolyte films without chemically crosslinked structure.With increasing the salt concentration,the glass transition temperature increased,and the melting temperature decreased followed by disappearing.