PROJECT TITLE :

Dielectric and electrical properties of radiation-cured epoxy

ABSTRACT:

Dielectric and electrical properties of radiation-cured epoxy are investigated in various conditions of electric field and temperature for various initiator content. The impact of the onium salt initiator is particularly considered due to the formation of ionic species which will impact the electrical properties. Dielectric spectroscopy performed in the temperature range -eighty °C to +200 °C and the frequency range 10-1 to 106 Hz shows that β-relaxation of the cured resin and relaxation because of ionic species are dominating the dielectric behavior at high and low 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 high and low 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.