Effect of endothermic reaction associated with glass transition on the breakdown strength of biodegradable polymer films

F. Kato, M. Matsushita, S. Omori, Yoshimichi Ohki

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Effects of endothermic reaction associated with glass transition on the impulse, dc, and ac breakdown strengths of poly-L-lactic acid (PLLA) and polyethylene terephthalate succinate (PETS) were studied experimentally. Impulse breakdown strength at first decreases monotonically with an increase in temperature for both PLLA and PETS. However, it increases and shows a hump when the temperature approaches a certain temperature that is slightly lower than the glass transition temperature. Then it decreases again. Moreover, it is shown that the degree of increment in impulse breakdown strength at this hump depends upon the crystallinity in PLLA. In the case of dc and ac breakdown, a similar local maximum as seen in impulse breakdown is not observed. Two possibilities, namely energy absorption and structural change both due to glass transition are discussed to explain the experimental results.

    Original languageEnglish
    Pages (from-to)653-655
    Number of pages3
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Volume14
    Issue number3
    DOIs
    Publication statusPublished - 2007 Jun

    Fingerprint

    Biodegradable polymers
    Lactic acid
    Polymer films
    Glass transition
    Polyethylene terephthalates
    Energy absorption
    Temperature

    Keywords

    • Biodegradable polymers
    • Breakdown strength
    • Glass transition

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Effect of endothermic reaction associated with glass transition on the breakdown strength of biodegradable polymer films. / Kato, F.; Matsushita, M.; Omori, S.; Ohki, Yoshimichi.

    In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 14, No. 3, 06.2007, p. 653-655.

    Research output: Contribution to journalArticle

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