Dielectric and electrical properties of radiation-cured epoxy

Author

Vissouvanadin, B. ; Teyssedre, G. ; Le Roy, S. ; Laurent, C. ; Ranoux, G. ; Coqueret, X.

Author_Institution

LAPLACE (Lab. Plasma et Conversion d´Energie, Univ. de Toulouse, Toulouse, France

Volume

22

Issue

2

fYear

2015

fDate

Apr-15

Firstpage

1142

Lastpage

1150

Abstract

Dielectric and electrical properties of radiation-cured epoxy are investigated in various conditions of electric field and temperature for different initiator content. The impact of the onium salt initiator is particularly considered due to the formation of ionic species that can impact the electrical properties. Dielectric spectroscopy performed in the temperature range -80 °C to +200 °C and the frequency range 10^-1 to 10⁶ Hz shows that β-relaxation of the cured resin and relaxation due to ionic species are dominating the dielectric behavior at low and high temperature respectively. Water absorbed in the resin increases the dielectric losses and conduction current. Ionic and electronic charge carriers are seen to dominate the electrical behavior at low and high field respectively. No clear trend has been observed as regard the effect of initiator concentration on the dielectric and electrical properties of radiation-cured epoxy.

Keywords

dielectric losses; electric fields; epoxy insulation; resins; Ionic charge carrier; dielectric behavior; dielectric loss; dielectric property; dielectric spectroscopy; electric field; electrical property; electronic charge carrier; ionic species formation; onium salt initiator; radiation-cured epoxy resin; Curing; Dielectric losses; Electrodes; Permittivity; Temperature distribution; Radiation curing; dielectric and electrical properties; epoxy;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2015.7076816

Filename

7076816