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 language | English |
|---|---|
| Article number | 4815188 |
| Pages (from-to) | 524-530 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 16 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 Apr |
Keywords
- Complex permittivity
- Conductivity
- Interfacial polarization
- Nanocomposites
- Polarization
- Polyamide
- Space charge
ASJC Scopus subject areas
- Electrical and Electronic Engineering