Title :
Effects of radiation doses up to 2 MGy on the thermally stimulated discharge current spectra for a cured epoxy resin system
Author :
Fouracre, R.A. ; Al-Attabi, A. ; Banford, H.W.
Author_Institution :
Centre for Electr. Power Eng., Strathclyde Univ., Glasgow, UK
Abstract :
A thermal cleaning technique was used to determine the distribution of activation energies associated with the Tg (glass transition temperature) peak in the TSDC (thermally stimulated discharge current) spectrum for a cured epoxy resin, MY750/HY956. In this technique the sample, after polarization, is partially heated, and then cooled, followed by reheating to a higher temperature, to produce current temperature curves. By repetition several such curves can be obtained from which the distribution of activation enthalpies can be determined from an Arrhenius plot of the initial current rise of each separate curve. The effects of dose on Tg are evaluated
Keywords :
gamma-ray effects; glass transition (polymers); heat treatment; neutron effects; organic insulating materials; polymers; thermally stimulated currents; 0.5 to 2 MGy; Arrhenius plot; MY750/HY956; TSDC; activation energies; activation enthalpy distribution; cured epoxy resin system; current temperature curves; gamma radiation neutron radiation; glass transition temperature; polarization; radiation dose effects; thermal cleaning technique; thermally stimulated discharge current spectra; Cleaning; Epoxy resins; Equations; Neutrons; Polarization; Power engineering; Space charge; Temperature; Thermal engineering; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283250
