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 LiClO 4 /AEP7 hybrids showed relatively high ionic conductivity of 7,9·10 −5 S·cm −1 at 25°C with 6 wt.‐% of LiClO 4 . 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)/LiClO 4 (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°C.