| Epoxide resin is a kind of excellent heat convertible resin,but it has bad toughness which limits its usage. So it is an important subject to improve its toughness with every kind of methods and has great significance. Some traditional method of improving toughness, such as adding elastomer, rigidity particle and hot plasticity resin, are on the base of decreasing strength and heat distortion temperature. Along with nano-technology wide using, many people use nano-particle to toughen epoxy. This kind of material seldom reduce strength, but it has many problems including complexity of preparation technics, high production cost and reunite easily.The purpose of this paper is to make use of montmorillonite to form nano particle in original position in epoxy, improving the mechanical and thermal properties. Montmorillonite is a kind of natural nano-structured layered silicate clays, and its layer thickness is only 0.96nm. When the epoxide resin is mixed with the montmorillonite, it can intercalate into the montmorillonite galleries. Then in the process of epoxy polymerization, the interlayer spacing of modified montmorillonite further increases. At last, the layers are dispersed in epoxy. In addition, montmorillonite has cheap price, abounding resources, lower cost than other nano materials.This paper includes three parts: montmorillonite modification,preparation and major properties of montmorillonite/epoxy(E-44) nanocomposite,preparation and properties test of montmorillonite/epoxy(E-12) nanocomposite。In the first part, this paper makes use of the uniformity experiment method to choose the best remarkable factor and the optimized technics to affect montmorillonite modification, and analyses the structure of organized montmorillonite, intercalate mechanism and array mode of modifying agent in interlayer. Now the domestic and international system adopt epoxide resin E-51 to compose montmorillonite/epoxy nanocomposite, but this study firstly adopts epoxide resin E-44 and E-12. In the second part, we has composed montmorillonite/epoxy (E-44) nanocomposite, and has tested its mechanical and thermal properties. In this part, we study the effect of mass percent and interlayer spacing of montmorillonite to nanocomposite, and also discuss toughen mechanism. In the last part, we firstly use monomer-synthesize method to compose montmorillonite/epoxy (E-12) nanocomposite, and compare its properties to traditional machine mixture method.The following conclusions can be drawn:The best modify condition for montmorillonite is: time 3 hours, temperature 100℃,1. solution PH value 5, the proportion of modifying agent and montmorillonite 4:5. The result of FT-IR, XRD and element analysis prove that the increasing of montmorillonite interlayer spacing is the result of intervene of modified agent c-18, and exchange amount of organic positive ion in montmorillonite interlayer is at direct proportion to interlayer spacing. The biggest value of interlayer spacing we gotten is 4.05nm, and it belong to incline double-layer array mode and itsαLM is 33.8°. This production keep ahead in our country.2. In the paper, montmorillonite/epoxy(E-44) nanocomposite is composed by using E44 as base material, MeTHPA as curing agent and organic montmorillonite as filler. The analysis results of XRD and TEM demonstrate the material is nanocomposite and montmorillonite interlayer spacing increases to 5-30 nm. In montmorillonite/epoxy(E-44) nanocomposite, the optimized content of ZheJiang organic montmorillonite is 3wt %. The testing result of mechanical and thermal properties of the nanocomposite showed that heat distortion temperature of the composite was improved by 8.4%, impact strength 19.4%, plane-strain fracture toughness 23.3%, when the ratio of ZJ-MMT to epoxide resin was 3wt%.3. The interlayer spacing of organic montmorillonite directly affects the mechanical and thermal properties of nanocomposite. To improve the properties of nanocomposite, ZZ-MMT is better than ZJ-MMT, and these two organic montmorillonite are bett...
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