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将过氧基团锚固于纳米SiO2粒子表面,进而通过表面原位引发苯乙烯聚合制备了聚苯乙烯(PS)/SiO2纳米复合粒子.纳米SiO2经亚硫酰氯(SOCl2)处理,再与叔丁基过氧化氢(TBHP)反应锚固形成过氧引发基团,通过表面引发氮氧自由基聚合反应引发苯乙烯聚合,制备了纳米氧化硅表面接枝聚苯乙烯/SiO2(PS-g-Silica)纳米复合材料,利用红外光谱、透射电子显微镜、原子力显微镜、热重分析等测试方法对制备的纳米复合粒子进行了表征与分析,结果表明表面引发氮氧自由基聚合反应可以制备良好的PS/SiO2纳米复合材料.
The peroxo groups were anchored on the surface of nano-SiO2 particles, and polystyrene (PS) / SiO2 nano-composite particles were prepared by surface in situ polymerization of styrene.The nano-SiO2 was treated with thionyl chloride (SOCl2) (PS-g-Silica) nanocomposite was prepared by anchoring the TBHP reaction to form peroxy initiating groups and initiating styrene polymerization by surface-initiated nitroxide radical polymerization. Nanocomposites were prepared and characterized by IR, TEM, atomic force microscopy and thermogravimetric analysis. The results showed that surface-initiated nitroxide polymerization could produce good PS / SiO2 Nanocomposites.