Ionic conductivity in oligo(ethylene oxide) esters of poly(itaconic acid)-salt mixtures: effect of side-chain length

J. M G Cowie, A. C S Martin

Research output: Contribution to journalArticle

Abstract

A series of poly(itaconic acid) esters with oligo(ethylene oxide) side chains have been prepared in which the side chains contain from one to seven ethylene oxide units. These materials can form amorphous solid solutions with LiClO4 and NaClO4. The glass transition temperatures and a.c. ionic conductivities of these polymer-salt mixtures have been examined as a function of side-chain length, salt concentration and temperature. It has been found that the polymer with seven ethylene oxide units per side chain produces a polymer electrolyte with the highest conductivities between 10-3 and 10-6 S cm-1 for the temperature range 400 K to ambient. In these systems the flexibility of the polymer chain seems to be a controlling feature as reflected in the polymer-salt Tg values. © 1991.

Original languageEnglish
Pages (from-to)2411-2417
Number of pages7
JournalPolymer
Volume32
Issue number13
Publication statusPublished - 1991

Keywords

  • chain flexibility
  • conductivity
  • glass transition temperature
  • poly(itaconic acid)
  • side-chain length

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