IONIC-CONDUCTION OF CROSS-LINKABLE OLIGO(OXYETHYLENE)-BRANCHED POLY(PHOSPHAZENE)

A new cross-linkable polyphosphazene [AEP7] in which allyl groups were introduced at the ends of the etheric side chains of the polymer was prepared. The LiClO4/AEP7 hybrids showed relatively high ionic conductivity of 7,9 . 10(-5) S . cm-1 at 25-degrees-C with 6 wt.-% of LiClO4. The ionic conductivity of the hybrids remained unchanged before and after cross-linking by UV-irradiation. The dimensional stability or the mechanical strength of the hybrids was improved upon cross-linking. Additionally, the cross-linked AEP7(29)/propylene carbonate (PC)(60)/LiClO4(11) (wt.-%) hybrids, in which PC was used as a plasticizer, showed an ionic conductivity as high as 3,1 . 10(-3) S . cm-1 at 25-degrees-C.