Abstract
The creep test of an epoxy-resin during irradiation was carried out at a cryogenic temperature. Creep deformation during irradiation was observed to be enhanced in comparison with those on a post-irradiated one. In order to clarify the mechanism of the radiation-induced creep, measurements of electron spin resonance (ESR) and solvent swelling of specimens have been performed. Radicals increased with the dose from the observation of ESR. Chain scission increased with the dose from the result of the swelling observation. The increase in the radicals corresponds to the increase of the chain scission. The mechanism of increased deformation of the resin during irradiation is proposed to be caused by increased scission of chain on the release of the local strain energy.
