POLYMER ELECTROLYTES BASED ON MODIFIED POLYSACCHARIDES .2. POLYETHER-MODIFIED CELLULOSICS

In order to improve the film-forming properties of polyether-based pol ymer electrolytes a new family of materials was synthesized. The struc tures described in this work involve a cellulosic ether backbone on wh ich oligoethers were grafted and crosslinked in various proportions vi a urethane chemistry and to which lithium perchlorate was subsequently added as a source of ionic species. The resulting networks were fully characterized in terms of glass transition temperature, dynamic mecha nical properties and ionic conductivity. With respect to the optimized polyether-based networks studied previously, the introduction of poly saccharide chains does not alter the basic features neither qualitativ ely nor quantitatively.