Length scale of mechanical heterogeneity in a glassy polymer determined by atomic force microscopy

Dong Wang, Yanhui Liu, Toshio Nishi, Ken Nakajima

    研究成果: Article査読

    16 被引用数 (Scopus)

    抄録

    Using dynamic force microscopy, nanoscale mechanical heterogeneity in glassy polymer was characterized. The correlation length of heterogeneous viscoelasticity was measured to be ∼2.1 nm, consistent with the length scale of cooperatively rearranging regions at glass transition and is independent of molecular weight. Apparent energy dissipation with the variation of ∼57, originating from non-uniform distribution of local viscoelasticity, was revealed. The results provide definite experimental evidences on the nanoscale heterogeneity in glassy polymers and bear important insights in understanding the puzzling glass transition.

    本文言語English
    論文番号251905
    ジャーナルApplied Physics Letters
    100
    25
    DOI
    出版ステータスPublished - 2012 6 18

    ASJC Scopus subject areas

    • 物理学および天文学(その他)

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