The mechanical properties of E-51 curing systems and AG-80 curing systems modified by epoxy-terminated hyperbranched polymers(EHBP) were investigated in this article. And the mechanisms of this modifying were analyzed through comparing the morphological differences of broken surfaces between these two systems.The results showed that the addition of EHBP can improve the mechanical properties of two curing systems effectively.In EHBP/E-51 curing systems,after the chemical induced phase separation,the EHBP par...