Abstract: A series of epoxide-containing acrylic polymer modifiers (HGMB) were synthesized.The dynamic mechanical behavior and impact strengths of the modified systems,epoxy resin E-51/4, 4'-diaminodiphenylmethane (DDM)/HGMB, were investigated.Theresults showed that both the structure and amount of the modifiers affected the impactstrength and modulus of the modified systems significantly.The addition of 15%(mass fraction) HGMB(4.3% glycidyl methacrylate(GMA), 5 % hydroxyethyl methacrylate(HEMA),25.7% methyl methacrylate (MMA) and 65 % butyl acrylate (BA) (mole fraction)) resultedin a 50% increase in impact strength and an obvious increase in T_g of the modified system butonly little loss of its modulus.

Key words: epoxy resins, modification, acrylate copolymer