POE incorporation into ionic clusters of ionomer and ion‐conduction behaviors

S. Takeoka, H. Sakai, H. Shin, T. Ohta, E. Tsuchida*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Poly(oxyethylene) (POE) was incorporated into the ionic clusters of ionomers, ethylene and methacrylic acid (7.2% neutralized with KOH) copolymer membrane. The changes of properties were studied from SAXS, DSC, IR and ionic conductivity. The IR study suggested that the coordinated structures in ionic clusters of the membrane were destroyed by POE incorporation, and also SAXS suggested that ionic clusters were swollen by POE incorporation. The ionic conductivity, a carrier being K+ in this system, increases from 10−16 S/cm to 10−9 S/cm at 30°C by the incorporation of POE (20.5 wt%). On the other hand, a large amount of POE (63 wt%) could be incorporated into ionomer membrane by the esterification of methacrylic acid groups (93%) with POE. When LiClO4 was added, ionic conduction occurred in the phase‐separated POE domain, which had a low glass transition temperature (−55.2°C), showing an ionic conductivity 2.6 × 10−6 S/cm at 25°C.

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalPolymers for Advanced Technologies
Volume2
Issue number2
DOIs
Publication statusPublished - 1991 Apr

Keywords

  • Ionic cluster
  • Ionomer
  • Oligo(oxyethylene)
  • Phase separation
  • Solid polymer electrolyte

ASJC Scopus subject areas

  • Polymers and Plastics

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