中文摘要：

采用超声波技术,原位插层聚合法制备了甲基苯基硅树脂/有机蒙脱土（OMMT）纳米复合材料。利用X射线衍射（XRD）,透射电镜（TEM）研究了复合材料内部结构以及超声波时间对蒙脱土分散性影响。结果表明,蒙脱土片层间距随着超声波时间延长而增加,当超声波时间短于20min时,有机蒙脱土片层以有序的插层型存在,形成插层型的聚合物/蒙脱土纳米复合材料（PLSN）;超声波时间长于30min时,有机蒙脱土片层被剥离,无序地分散在硅树脂基体中,形成剥离型的聚合物/蒙脱土纳米复合材料。

英文摘要：

Using ultrasonic technology,phenylmethylsilicone/organic montmorillonite （OMMT） nanocomposites were prepared by in-situ intercalative polymerization. The internal structure and morphology of the nanocomposites were characterized by X-ray diffraction （XRD）,and transmission electron microscope （TEM）. The effect of time for ultrasonic processing on the dispersing of MMT lamellar was also studied. The results show that the basal spacing of OMMT increases with the increase of ultrasonic time. When the ultrasonic time is less than 20 minutes,the OMMT lamellars exist orderly in nanocomposites,resulting in polymer/OMMT intercalation nanocomposites. However,when the ultrasonic time is over 30 minutes,the OMMT lamellars exist disorderly in nanocomposites and most of layers are dispersed in nanosize,leading to the formation of polymer/OMMT exfoliated nanocomposites.