Radiation processing of unfilled polyester resins

Abstract

Abstract Four commercially available, thermally cured polyester resins were subjected to γ‐irradiation at dosages of 1·0 × 10 6 to 5·0 × 10 7 rad. and the effects of the irradiations on physical properties were examined. The greatest effects were on tensile strength and Young's modulus in which 20% improvement was noted. There were no significant changes in hardness or heat distortion properties. Styrene‐modified polyester syrups can be completely cured by irradiation at 5·0 × 10 6 to 1·0 × 10 7 rad. but the properties of the cured products are not significantly superior to those of materials cured by conventional procedures.