Chain conformation effects on molecular motions at the surface of poly(methyl methacrylate) films

Yoshihisa Fujii, Kei Ichi Akabori, Keiji Tanaka, Toshihiko Nagamura

    研究成果: Contribution to journalArticle査読

    27 被引用数 (Scopus)

    抄録

    Surface relaxation in syndiotactic (st-) and isotactic (it-) poly(methyl methacrylate) (PMMA) films was studied by lateral force microscopy. The αa- and β-relaxation processes were clearly observed even at the surface, permitting us to deduce the form of the dispersion map for the surface relaxation processes. Both relaxation temperatures at the surface were lower than the corresponding ones in the bulk. In addition, the extent to which the peak temperature for the surface relaxation processes fell below that of the bulk strongly depended on the stereoregularity of the films. The differences in the chain conformations between the surface and the bulk, which were more remarkable in the st-PMMA, produced this variation in surface mobility.

    本文言語英語
    ページ(範囲)928-934
    ページ数7
    ジャーナルPolymer Journal
    39
    9
    DOI
    出版ステータス出版済み - 2007

    All Science Journal Classification (ASJC) codes

    • ポリマーおよびプラスチック
    • 材料化学

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