中文摘要：

为改进环氧树脂固有的一些缺陷和不足,提出了利用纳米复合材料的特殊性改性环氧树脂的一新的研究途径。在选取经十六烷基季铵盐有机化表面修饰的蒙脱土对双酚A型环氧树脂进行改性时分别采用溶液插层法与熔融插层法制备了不同蒙脱土含量的环氧树脂/蒙脱土复合材料;利用X射线衍射法测试了剥离前后蒙脱土的层间距;用扫描电子显微镜（SEM）观察了试样的冲击断口形貌,研究了该复合材料的两相结构;采用热重法（TGA）测定了试样的热分解温度,并对其热稳定性进行了对比。结果表明,无论是溶液插层法还是熔融插层法,均能制得剥离型环氧树脂/蒙脱土纳米复合材料。但是,在机械分散的作用下,纳米粒子易发生团聚,使复合材料中的无机相无法均匀的分散。热重分析结果发现,复合材料的热分解温度并没有随着蒙脱土含量的增加而增加,而是表现出更为复杂的发展趋势。

英文摘要：

Epoxy/organic-montmorillonite nanocomposites with different contents of inorganic particles were pre pared by diglycidyl ether of bisphenol A, with surface modified montmorillonite as modifying agent through solvent intercalation and melting intercalation processes, respectively. Methylenadic anhydride plays a curing role in this system. The intergallery distance of montmorillonite was measured by X-ray diffraction before and after exfoliation. The interphase morphological characteristic of the fracture surface on specimen was characterized by scanning electric microscopy. Thermogravimetric analyses were carried out to estimate the thermal performance of the composites. Some conclusions are drawn by analyzing the results that exfoliated composites can be prepared via either a solvent intercalation process or a melt intercalation process. It is found that the clay layers cannot be separated further in the duration of mechanic stirring because of the generated agglomeration. The thermal decomposition temperature does not increase with the increased concentration of nanoclay but present a complicated tendency.