Title :
Dynamic mechanical behaviours of epoxy insulating composites
Author :
Li, Y. ; Unsworth, J.
Author_Institution :
Centre for Materials Technol., Univ. of Technol., Sydney, NSW, Australia
Abstract :
A bisphenol-A epoxy/silica composite and a cycloaliphatic epoxy/silica composite are investigated for their dynamic mechanical properties. It is found that the glass transition of the epoxy composites can be detected by the change of dynamic storage modulus E´ and dissipation tanδ curves. For both materials, E´ experiences significant drop in the glass transition regions, while E´ below and above Tg shows little change with temperature. It is found that E´ and tanδ curves of the composites change dramatically with thermal aging. It is concluded that the dynamic mechanical properties of both types of epoxy composites change significantly during glass transition
Keywords :
epoxy insulation; bisphenol-A epoxy/silica composite; cycloaliphatic epoxy/silica composite; dissipation tanδ curves; dynamic mechanical properties; dynamic storage modulus; epoxy insulating composites; glass transition; thermal aging; Aging; Control systems; Dielectric losses; Dielectric materials; Dielectrics and electrical insulation; Mechanical factors; Polymers; Silicon compounds; Stress; Temperature control;
Conference_Titel :
Electrical Electronics Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 1993. Proceedings., Chicago '93 EEIC/ICWA Exposition
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0847-6
DOI :
10.1109/EEIC.1993.630921
