Thermal molecular motion of cyclic polystyrene thin films

Yoshihisa Fujii, Kazuhiro Koguchi, Keiji Tanaka, Toshihiko Nagamura, Atsushi Takano, Yushu Matsushita, Tisato Kajiyama

    Research output: Contribution to conferencePaperpeer-review


    Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene (l-PS) with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, mechanical relaxation behavior of l- and c-PS thin films was examined. The αa- relaxation process corresponding to the segmental motion was clearly observed for the both films. Assuming that Vogel-Fulcher law could be simply applied to the l- and c-PS thin films, glass transition temperatures of the films were estimated to be 375 K and 379 K, respectively. More conclusive work using thinner l- and c-PS films will be presented in the talk.

    Original languageEnglish
    Number of pages2
    Publication statusPublished - 2005
    Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
    Duration: Sept 20 2005Sept 22 2005


    Other54th SPSJ Symposium on Macromolecules

    All Science Journal Classification (ASJC) codes

    • General Engineering


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