Study On The Thermal Model And Horniness Segmer Toughening Modification Of Epoxy Resin

Epoxy resins have been extensively used in paints, adhesives, electronic and electrical materials, engineering plastics, composite materials and structural materials owing to their many attractive properties, such as excellent physical and mechanical properties, good thermal and electrical properties and excellent anticorrosive performance. Up to now, research efforts on improving epoxy resins' properties are still attractive for advanced applications with the development of modern industry. Low cost and high performance are the central task in material research and application. To improve thermal properties of epoxy resins is an important task in it.It's supposed that the thermal properties of epoxy resins are contributed by functional group and there is "thermal factor" brought forward and mathematical thermal model just established in this article. The thermal model has been analyzed through SPSS statistic software and check correctness of the model as well.The results show that the thermal contribution to epoxy resin is different because of various functional groups. Namely different functional groups have different thermal factors. The thermal factors of cyclohexenyl, benzene ring and triazinyl are namely 2.026(℃·L/mol), 19.487(℃·L/mol), 39.439(℃·L/mol). The thermal properties of epoxy resin blend system can be expressed below:Tg=a₀+a₁A+b₁B+C₁C+...That's, a₀ is constant equaling to 35.546℃. a₁, b₁ and c₁ are the thermal factors of functional group A, B and C, with unit ℃·L/mol. A, B and C... are the contents of thermal functional group, with unit mol/L.It's discussed that horniness segmer graft toughen epoxy resin in this article. The mechanical properties of horniness segmer graft toughening epoxy resin, toughening effect and microstructure of the fracture surface of toughened condensate have been studied on.The results shows that, for common epoxy resin, the toughness has been improved by 35.7% and 42.9%, when JY— l's addition at 15% and JD-1 at 30%. It's obvious in toughening, which just reach foreign toughener X—13 and X—16. For high temperature epoxy resin, it's best not more than 15% that the quantity added to epoxy resin.