The Relationship between Chemorheology and the Degradation Behavior of Crosslinked Polyurethane Rubber

Kenkichi Murakami, Hidetoshi Oikawa, Tsuyoshi Nagai

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Chemorheology is the best means to elucidate the degradation mechanism of crosslinked polymer at its initial stage. Most of chemorheological research which have been carried out all this while are those related to the scission mechanism of main-chains. The paper deals with the scission mechanism of crosslink site of crosslinked polymers which case is very rare. Polyurethane vulcanizatcs are exposed in N2 gas at high temperatures, 383, 393 and 403K, and in the solution of n-BuNH2/DMSO at 298, 303 and 308K. Chemical relaxation curves thus obtained were found to be consistent with theoretical prediction by Tobolsky. The scission mechanism of crosslink sites of polyurethane vulcanizates was also studied by the swelling, GPC, and IR measurements.

    Original languageEnglish
    Pages (from-to)77-85
    Number of pages9
    JournalNihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
    Volume17
    Issue number2
    DOIs
    Publication statusPublished - 1989

    Keywords

    • Chemorheology
    • Crosslinked polyurethane rubber

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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