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Development of modification of epoxy resin

In recent years, scientists have done a lot of epoxy resin modification, to overcome their brittle, drawbacks such as low impact resistance, heat resistance and achieved fruitful results. The past, the modification of epoxy resin has been limited to rubber, such as carboxyl-butyl rubber, hydroxyl-terminated Ding La rubber, poly Achilles rubber [1-4]. In recent years, the modification of epoxy resins with further modification of the ever-changing, interpenetrating polymer network, chemical polymerization method, especially in liquid crystalline toughening law and nano-particles toughened approach is research hotspot in recent years. Reviewed progress in modification research of epoxy resin at home and abroad.
Using acrylic material and toughening epoxy resins on acrylate copolymers can be the introduction of active groups, active group of epoxy groups or the radical reaction with epoxy resin, forming graft copolymer, and increasing the compatibility of the two phases. Another method is to use acrylic elastic particle toughening of epoxy resin to reduce internal stress. Acrylic can also be crosslinked network structure with epoxy resin composition of interpenetrating polymer network (IPN) structure to achieve the purpose of toughening.
Haiyan Zhang [5], people using epoxy resin and methyl acrylic added into aggregate get ring oxygen-methyl acrylic resin (EAM), its process sex and not saturated polyester similar, chemical structure and and epoxy resin similar, get of modified sex resin system by curing Hou not only has excellent of bonded sex and chemical stability, and has heat sex good, and high of extends rate, curing process simple, advantages. Also due to the introduction of chain methacrylate copolymer, System curing Crosslinking density decreased, the introduction of side-chain molecular volume provides more freedom of movement, so modifying the impact will improve performance.