Thermal molecular motion of polyethylene thin films

Hirohiko Yakabe, Keiji Tanaka, Toshihiko Nagamura, Tisato Kajiyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Melting and relaxation behaviors in thin films of high-density and linear low-density polyethylene (HDPE and LLDPE) were examined by microthermal analysis and dynamic viscoelastic measurements, respectively. Melting point (T m) in HDPE and LLDPE films, respectively, increased and decreased with decreasing thickness. In the case of the HDPE films, the amorphous content decreased with decreasing thickness. This leads to that molecular motion of chains involved in the crystalline region is depressed with decreasing thickness. In contrast, although the amorphous content also decreased with decreasing thickness for the LLDPE films, it is not so small. Invoking that molecular motion in the amorphous region becomes active and dominates with decreasing film thickness, it can be understood that T m decreased with thickness for the LLDPE films.

    Original languageEnglish
    Title of host publication54th SPSJ Annual Meeting 2005 - Polymer Preprints, Japan
    Number of pages1
    Publication statusPublished - 2005
    Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
    Duration: May 25 2005May 27 2005


    Other54th SPSJ Annual Meeting 2005

    All Science Journal Classification (ASJC) codes

    • Engineering(all)


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