中文摘要：

采用原位乳液聚合法制备了聚甲基丙烯酸甲酯（PMMA）／SBA-15介孔复合材料，研究了不同用量介孔硅SBA．15（0、l％、2．5％、5％）对PMMA／SBA-15介孔复合材料性能的影响。红外光谱（IR）和X射线衍射（XRD）分析表明成功制备了PMMA／SBA-15复合材料。以乳液聚合法制备的PMMA／SBA-15复合材料具有较高的单体转化率和固体含量，随着SBA-15用量的增加，聚合过程中凝聚率增大、粘度减小，复合乳液具有较大的粒径及更宽的粒径分布。动态力学分析（DMA）测试表明：PMMA／SBA-15复合材料储能模量和杨氏模量明显增大，且在SBA-15用量为2．5％时复合材料模量最高。差示扫描量热（DSC）测试表明：随着SBA-15用量增加，复合材料玻璃化温度提高。热重分析（TGA）结果证实复合材料热稳定性没有明显变化。

英文摘要：

Poly（ methyl methacrylate） （ PMMA）/SBA-15 （0,1% ,2. 5% ,5% ） composite materials are prepared with different loadings of mesoporous molecular sieve SBA-15 via in-situ emulsion polymerization, and the properties of as-prepared composite emulsions are investigated by infrared spectroscopy （IR） and X-ray diffraction （XRD）. The results show that the PMMA/SBA-15 composites are prepared successfully. The composite emulsions demonstrate high monomer conversion and coagulum, low viscosity, relatively large particle size, and wide range of distribution. The PMMA/SBA-15 composite film exhibites greater storage modulus and higher Young＇s modulus when compared with pure PMMA （especially, the composite with 2. 5% SBA - 15 displayed the greatest storage and Young＇s modulus）. The glass transition temperature of the composites increases with the increase of mesoporous silica loading. TGA confirms that the thermal stabilities of PMMA/SBA-15 composites are not influenced apparently.