Effects of nanofiller loading on the molecular motion and carrier transport in polyamide

Norikazu Fuse, Hiroki Sato, Yoshimichi Ohki, Toshikatsu Tanaka

    Research output: Contribution to journalArticle

    47 Citations (Scopus)

    Abstract

    Effects of nanofiller loading on the molecular motion and carrier transport in polyamide-6/mica nanocomposites were discussed by analyzing their complex permittivity spectra. As a result, the following four dielectric polarization processes were observed; space charge polarization, interfacial polarization at crystalline/ amorphous boundaries, α relaxation due to dipolar orientation, and β relaxation due to rotation of amide groups bonded with water molecules. The enhancement of dielectric constant and that of loss factor due to abundance of mobile charge carriers are suppressed by the nanofiller loading. Furthermore, it was found that the relaxation time becomes longer by the mica nanofiller loading both for the dipolar orientation and for the rotation of amide groups. These results suggest that molecular motion that assists carrier transport is suppressed in nanocomposites, which indicates a strong interaction between the resin and filler.

    Original languageEnglish
    Article number4815188
    Pages (from-to)524-530
    Number of pages7
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Volume16
    Issue number2
    DOIs
    Publication statusPublished - 2009 Apr

    Fingerprint

    Carrier transport
    Polyamides
    Mica
    Polarization
    Amides
    Nanocomposites
    Permittivity
    Charge carriers
    Electric space charge
    Crystal orientation
    Relaxation time
    Fillers
    Resins
    Crystalline materials
    Molecules
    Water

    Keywords

    • Complex permittivity
    • Conductivity
    • Interfacial polarization
    • Nanocomposites
    • Polarization
    • Polyamide
    • Space charge

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Effects of nanofiller loading on the molecular motion and carrier transport in polyamide. / Fuse, Norikazu; Sato, Hiroki; Ohki, Yoshimichi; Tanaka, Toshikatsu.

    In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, No. 2, 4815188, 04.2009, p. 524-530.

    Research output: Contribution to journalArticle

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