Characterization of surface viscoelasticity and energy dissipation in a polymer film by atomic force microscopy

Dong Wang, Xiao Bin Liang, Yan Hui Liu, So Fujinami, Toshio Nishi, Ken Nakajima

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)

    Abstract

    The characterization of surface viscoelasticity and energy dissipation in a polymer film by atomic force microscopy was investigated. The SEBS consisting of hard PS and soft PEB components was selected. The number-average molecular weight, Mn, is 74 000, and the molecular weight distribution, Mw/Mn, was about 1.1. The weight fraction of PS for this triblock copolymer was 42%. The as-prepared films were first dried in a fume hood for 3 days and then in vacuum at room temperature for another 7 days to remove residual solvent. The quality factor Q was calculated by dividing the resonant frequency by the width of the resonant peak at half the maximum power. The samples were scanned at constant force using a triangular Si3N4 cantilevers with nominal spring constant of 0.32 N/m. The regions exhibiting larger Edis could be identified as the soft PEB blocks, while the regions showing smaller Edis correspond to the hard PS blocks.

    Original languageEnglish
    Pages (from-to)8693-8697
    Number of pages5
    JournalMacromolecules
    Volume44
    Issue number21
    DOIs
    Publication statusPublished - 2011 Nov 8

    ASJC Scopus subject areas

    • Organic Chemistry
    • Polymers and Plastics
    • Inorganic Chemistry
    • Materials Chemistry

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