Abstract
To improved performance of the epoxy resin, an allyl group and hydroxymethyl group were introduced into epoxy resin. Maleimide modified epoxy resin was synthesized by the reaction of epoxy resin having allyl group with N-phenylmaleimide. Glass transition temperature and lap shear adhesive strength aged at 200℃ of cured maleimide modified epoxy resins were higher than those of cured commercial epoxy resin (DGEBA). Urethane modified epoxy resin (EPCI) was synthesized by the reaction of epoxy resin having hydroxymethyl group with isocyanate prepolymer. And siloxane modified epoxy resin (ECDG) was synthesized by the reaction of epoxy resin having allyl group with hydride terminated polydimethylsiloxane. Fracture toughness and adhesive properties of cured EPCI and ESDG were superior to those of cured DGEBA.
