Abstract
Epoxy resins are network polymers widely used as structural materials and adhesives in many industries. Several modifiers, such as rubbers, fillers, and thermoplastic resins, were investigated to improve the fracture toughness of the cured epoxy resins, as well as the investigation of new chemical structures of epoxy oligomers and curing agents. Recently, block copolymers having self-assembly ability get attracted attention as modifiers for toughening of epoxy resins. In this paper, the self-assembly nano-structures of the epoxy blends and the mechanical properties are reviewed.