1、 Modification of epoxy resin are reviewed Rehana Fowzia and Mahmuda Nasrin Abstract: the article introduces the characteristics of the epoxy resin and epoxy resin modified improve the toughness of epoxy resin, which is the main trend, respectively discusses the rubber toughening epoxy resin, thermop
2、lastic elastomer toughening epoxy resin, thermotropic liquid crystal polymer toughening epoxy resin, flexible chain segment curing agent, toughening epoxy resin, inorganic nanomaterials modified epoxy resin and interpenetrating network (IPN) structure of toughening modification of epoxy resin such a
3、s epoxy resin system. At the same time, the characteristics of polyurethane, epoxy resin modified by polyurethane has six kinds of methods and technology of interpenetrating polymer network, are discussed in detail, and analyzes the technical problems of the modified epoxy resin. Keywords: epoxy res
4、in; Toughening.;modified Intorduction Epoxy resin (EP) is a polymer matrix composites 1-2 the most widely used matrix resin. EP is a kind of thermosetting resin, available since 1930, the United States in 1947 to realize industrialized production, has been more than 50 years history. Because the epo
5、xy resin has excellent bonding properties, abrasion resistance, mechanical properties, chemical stability, electrical insulation, and low shrinkage, easy processing and forming, stress transfer and the advantages of low cost, good, light is widely used in coatings, adhesives, construction, machinery
6、, aerospace, electronics, advanced electrical insulating materials Matrix composite materials and other fields. Crosslinking density is high, but as a result of EP after curing with three dimensional network structure, there exists large internal stress, very brittle and poor fatigue resistance, heat resistance, impact resistance, result in the crack of the peel strength, shear strength is poorer, low strain of faults, is difficult to meet the requirements of engineering technology, make its
