Conductive-filler-filled poly(ε-caprolactone)/poly(vinyl butyral) blends. II. Electric properties (positive temperature coefficient phenomenon)

Jeong Chang Lee, Ken Nakajima, Takayuki Ikehara, Toshio Nishi

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)

    Abstract

    The electric properties of poly(ε-caprolactone) (PCL)/poly(vinyl butyral) (PVB) blends containing carbon black (CB) were studied as a functions of the PVB content and crystallization time. Comparison of the electric properties between the two cases (PCL/PVB blends and pure PCL) provided us useful information on the origin of the positive temperature coefficient (PTC) phenomenon of the resistivity. In this article, we report the influence of the morphology and the spherulitic structure on the distribution of CB, which results in the resistivity changes. Blending a small amount (up to 5%) of PVB caused significant changes in the electric property at a constant CB content. Both the resistivity and the intensity of PTC increased with the PVB content. These changes are ascribed to the change of CB distribution. A model is proposed to explain these results using Ohe's theory.

    Original languageEnglish
    Pages (from-to)409-416
    Number of pages8
    JournalJournal of Applied Polymer Science
    Volume65
    Issue number2
    DOIs
    Publication statusPublished - 1997 Jul 11

    Keywords

    • Carbon black
    • Poly(vinyl butyral)
    • Poly(ε-caprolactone)
    • Polymer blend
    • Positive temperature coefficient

    ASJC Scopus subject areas

    • Chemistry(all)
    • Surfaces, Coatings and Films
    • Polymers and Plastics
    • Materials Chemistry

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