Re-examination of the Dielectric Spectra of Epoxy Resins: Bulk Charge Transport and Interfacial Polarization Peaks
Tipo de material:
TextoSeries ; IEEE Transactions on Dielectrics and Electrical Insulation, 21(3), p.1330-1341, 2014Trabajos contenidos: - Chalashkanov, N. M
- Dodd, S. J
- Dissado, L. A
- Fothergill, J. C
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The dielectric properties of two amine cured bisphenol-A epoxy resin systems, Araldite CY1301 and Araldite CY1311 have been characterized using dielectric spectroscopy over the frequency range 1 mHz to 100 kHz. These two epoxy resin systems were chosen to allow the dielectric response to be studied from above and below the glass transition, as Araldite CY1311 is a modified version (with added plasticizer)of Araldite CY1301. The dielectric response was found to comprise both bulk and interfacial features. Above the glass transition temperature, two processes were identified, a low frequency process usually ascribed to interfacial polarization is shown to be a bulk process termed Quasi-DC (QDC)conduction and a dielectric dispersion usually taken to be a bulk process has been shown to be an interfacial effect.
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