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以3-(三甲氧基甲硅烷基)丙基-2-甲基-2-丙烯酸酯为偶联剂对SiO2进行表面改性,得到改性的SiO2颗粒(MPS-SiO2),用原位聚合法以甲基丙烯酸在MPS-SiO2上杂化聚合制备了聚甲基丙烯酸-二氧化硅(PMMA-SiO2)复合材料。采用SEM观察了复合材料的形貌;采用IR和TGA对PMMA-SiO2的结构和性能进行了表征。结果表明,MPS-SiO2颗粒能够成功地被甲基丙烯酸杂化聚合形成PMMA-SiO2复合材料;最优的反应条件是MPS-SiO2为0.4g,甲苯为30mL,甲基丙烯酸为1mL,过氧化苯甲酰为0.01g;最优的干燥条件是PMMA-SiO2先经溶剂抽提,再在真空30℃下干燥。
The surface modification of SiO2 with 3- (trimethoxysilyl) propyl-2-methyl-2-acrylate as coupling agent gave modified SiO2 particles (MPS-SiO2) Polymethacrylate-silica (PMMA-SiO2) composites were prepared by the hybrid polymerization of methacrylic acid on MPS-SiO2. The morphology of the composites was observed by SEM. The structure and properties of PMMA-SiO2 were characterized by IR and TGA. The results showed that MPS-SiO2 particles could be successfully polymerized by methacrylic acid to form PMMA-SiO2 composites. The optimal reaction conditions were MPS-SiO2 0.4 g, toluene 30 mL, methacrylic acid 1 mL, Formyl 0.01g; the best drying conditions are PMMA-SiO2 solvent extraction, and then dried under vacuum at 30 ℃.