Comparison of dielectric properties between epoxy composites with nanosized clay fillers modified by primary amine and tertiary amine

N. Tagami, M. Hyuga, Yoshimichi Ohki, T. Tanaka, T. Imai, M. Harada, M. Ochi

    Research output: Contribution to journalArticle

    48 Citations (Scopus)

    Abstract

    Epoxy-based nanocomposites (NCs) were prepared using clay modified by either primary amine or tertiary amine, and the effect of the difference in modifier on the thermal and dielectric properties of the NCs were discussed. The NC with clay fillers modified by the primary amine, 1C, shows a glass transition end temperature (Teg) at a temperature 20 C lower than the neat epoxy (N). This indicates that the resin of 1C is less crosslinked than that of N. On the other hand, the sample 3C, in which the clay was modified by the tertiary amine, shows a DSC spectrum close to that of N. Namely, 3C has a high crosslinking density similar to N. While the three samples show a relaxation peak in their dielectric loss spectra, the peak appears at high frequencies in 1C compared to N and 3C. Moreover, ionic conduction current flows more at high temperatures in 1C than in N or 3C. These facts are ascribable to the difference in their crosslinking densities.

    Original languageEnglish
    Article number5412020
    Pages (from-to)214-220
    Number of pages7
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Volume17
    Issue number1
    DOIs
    Publication statusPublished - 2010 Feb

    Fingerprint

    Dielectric properties
    Fillers
    Amines
    Clay
    Nanocomposites
    Composite materials
    Crosslinking
    Ionic conduction
    Dielectric losses
    Temperature
    Glass transition
    Thermodynamic properties
    Resins

    Keywords

    • Clay modifier
    • Complex permittivity
    • Dielectric properties
    • DSC
    • Electric conduction
    • Epoxy nanocomposite

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Comparison of dielectric properties between epoxy composites with nanosized clay fillers modified by primary amine and tertiary amine. / Tagami, N.; Hyuga, M.; Ohki, Yoshimichi; Tanaka, T.; Imai, T.; Harada, M.; Ochi, M.

    In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 17, No. 1, 5412020, 02.2010, p. 214-220.

    Research output: Contribution to journalArticle

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    AU - Ohki, Yoshimichi

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    AU - Imai, T.

    AU - Harada, M.

    AU - Ochi, M.

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