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 journalArticlepeer-review

48 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

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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