Abstract
Irradiation using 120-keV protons was performed on the AG-80 epoxy resin and the unidirectional M40J/AG-80 composite. Changes in the bend strength, bend modulus, interlayer shear strength, and mass loss ratio were examined. Experimental results show that by using proton fluences lower than approximated, the cross-linking density increases with the fluence in the surface layer of the AG-80 epoxy matrix and increases the bend strength and modulus for the composite. Increasing the fluence above 6.3 × 1015 cm−2, the cross-linking density, bend strength, and bend modulus are decreased. The mass loss ratios for both the AG-80 epoxy resin and the M40J/AG-80 composites increase with increasing proton fluence, and then level off.
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