SYNTHESIS OF POLYPHOSPHAZENES WITH ETHYLENEOXY-CONTAINING SIDE-GROUPS- NEW SOLID-ELECTROLYTE MATERIALS

A series of mixed-substituent poly(organophosphazenes) with ethyleneox y side groups has been synthesized. These polymers possess multiple el ectron-donor coordination sites that can form complexes with metal sal ts and generate ''solid electrolyte'' behavior. The polymers were char acterized by P-31, H-1, and C-13 NMR spectroscopy, gel permeation chro matography (GPC), differential scanning calorimetry (DSC), and element al analysis. All the mixed-substituent polymers have low glass transit ion temperatures, from -70 to -56 degrees C, as well as at least one m elting transition. Several polymer-lithium triflate complexes were exa mined by impedance analysis. The maximum conductivities for these poly mers ranged from 1.6 x 10(-6) to 3.9 x 10(-5) S cm(-1).