Abstract
Thermally stimulated current (T. S. C.) and dielectric loss (D. L.) measurements have been performed on five kinds of commercially available organic composite materials, such as G-10CRR, G-11CRR, SpaulradR, Lamiverre-AR, and HoxanR. Substantial information on the changes and degradation in matrices was obtained from both measurements. The different temperature dependences of T. S. C. and/or D. L. were revealed in differnt matrices of FRP. Further T. S. C. and D. L. measurements were also performed on the specimens which were subjected to different curing conditions or gamma irradiation up to 2.1×109rad. Long curing time resulted in a decrement of the magnitude of T. S. C. Higher gamma doses induced enhancements of T. S. C. Inter laminar shear strength of irradiated samples was decreased by 25 per cent in comparison with that before irradiation. This decrement in irradiated samples was discussed on the basis of the results from T. S. C. measurements. It was found that T. S. C. and/or D. L. measurements supplied significant information on the change in characteristics and degradation of organic composite materials.
