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

Shinji Takeoka, H. Sakai, H. Shin, T. Ohta, E. Tsuchida

    Research output: Contribution to journalArticle

    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

    Keywords

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

    ASJC Scopus subject areas

    • Polymers and Plastics

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