中文摘要：

以甲基苯基二氯硅烷和甲基三氯硅烷为单体,采用原位插层聚合法制备甲基苯基硅树脂/有机蒙脱土（organic montmorillonite,OMMT）纳米复合材料,并通过红外光谱仪（FTIR）、X射线衍射仪（XRD）、透射电镜（TEM）和综合热分析仪（DSC）研究了复合材料的结构,探讨了超声波对蒙脱土分散性和复合材料热性能的影响.结果表明：制备的OMMT复合材料为含有端羟基的甲基苯基硅树脂复合材料;采用机械搅拌即可制备剥离型纳米复合材料,超声波辅助可进一步促进蒙脱土片层的分散,使片层剥离程度增加;OMMT的添加会降低有机硅树脂的热稳定性,且随着OMMT含量的增加,纳米复合材料的热失重先减小后增大,当OMMT质量分数为6%时复合材料的热稳定性最好,超声波辅助可进一步改善复合材料的耐热性能.

英文摘要：

Using methylphenyldichlorosilane and methyltrichlorosilane as monomers, the phenylmethylsilicone/organic montmorillonite（OMMT） nanocomposites are prepared by in-situ intercalative polymerization. The internal structure and morphology of the nanocomposites are characterized by Fourier transform infrared spectrometer （FTIR）, X-ray diffraction （XRD）, transmission electron microscope（TEM） and differential scanning calorimetry（DSC）. The effects of ultrasonic processing on the dispersing of MMT lamellar and the thermal property of nanocomposites are discussed. The results show that the prepared nanocomposites are methylphenyldichlorosilane matrix materials with end hydroxyl. The exfoliated nanocomposites are prepared with only mechanical stirring, and the dispersing of MMT lamellar can be improved by ultrasonic processing to increase the exfoliating extent. With the increase of OMMT content, the thermogravimetry loss is deceased with latter increasing. The best thermal stability can be obtained for the OMMT content of 6 %, and the thermal stability can be improved by ultrasonic processing.