中文摘要：

以原位微悬浮聚合法所制的微米级聚丙烯酸酯 PA/MPS 偶联改性 S iO 2 （P A /M P S -S iO 2）接枝复合胶粒 为研究对象,利用自带热台的 3D 视频显微系统在线观察复合胶粒在良溶剂中的尺寸变化情况,并结合索氏抽提实 验所测复合胶粒凝胶率的结果,评估复合胶粒的溶胀性能.考察复合胶粒的 S iO 2 粒子含量、 S iO 2 表 面 M P S 偶联密 度等因素对其溶胀行为的影响,结果表明接枝复合胶粒中存在以接枝 S i O2 粒子为交联点的立体网络结构,这是决定接枝复合胶粒溶胀性能的关键因素.

英文摘要：

PA/MPS modified SiO2 micro-composite colloidal particles （P A /MPS-SiO2） prepared by in- situ suspension polymerization method served as the object of study. 3D video microscope system equipped with heating stage was applied to online observe the dimensional change of these complex colloidal particles in the organic solvent. The swelling behavior of complex colloidal particles were evaluated in combination of results of soxhlet extraction experiments. The effects of SiO2 content and MPS coupling density on SiO2 surface on the swelling behavior were investigated. The results indicate that three-dimensional network structure with the in te r lin k in g point of SiO2 particles exists in composite colloidal particles factor deciding swelling property of composite colloidal particles.Key words：