聚丙烯酸酯原位乳液聚合包覆SiO2的研究

用经甲基丙烯酰氧基丙基三乙氧基硅烷（MAPS）处理过的纳米SiO2作种子，进行聚丙烯酸酯（ACR）的原位乳液聚合，制成了MAPS－SiO2/ACR复合物；探讨了种子乳液聚合的过程，分析了包覆机理，讨论了SiO2的用量对聚合反应速率及残渣率的影响，结果表明：在以纳米SiO2为种子的ACR乳液聚合中，单体的转化率及聚合反应速率随SiO2用量的增加而下降；当SiO2的用量为10％时，复合物与聚氯乙烯共混后，其拉伸强度和冲击强度最高。

Study on Acrylic Resin Encapsulated SiO2 of In-suit Emulsion Polymerization

s:SiO 2/ACR composite was synthesized by acrylic resin of in suit emulsion polymerization using nano SiO 2 particle as core treated with MAPS and acrylic resin as shell; then made ultimately. The process of in suit emulsion polymerization was approached, its encapsulation mechanics was analyzed, and the effect of SiO 2 amount on the reacting velocity and sediment percentage was discussed. It was indicated that in the process of ACR emulsion polymerization with nano SiO 2 particle as core, the more amount of SiO 2, the less rate of conversion and polymerization of the monomer. The composite material, which blended with 10 % SiO 2 encapsulated ACR and PVC resin, had excellent tensile strength and impact strength compared with blend of the pure ACR and PVC resin.