Dispersion of“guava-like”silica/polyacrylate nanocomposite particles in polyacrylate matrix

作     者：Dongming QI Minghua WU Lei YANG Jianzhong SHAO Yongzhong BAO 

作者机构：Key Laboratory of Advanced Textile Materials and Manufacturing TechnologyMinistry of EducationZhejiang Sci-Tech UniversityHangzhou 310018China State Key Laboratory of Chemical EngineeringZhejiang UniversityHangzhou 310027China 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2008年第2卷第2期

页      面：127-134页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Science and Technology Department of Zhejiang Province 

主　　题：silica polyacrylate nanocomposite dispersion 

摘      要：A series of“guava-likesilica/polyacrylate nanocomposite particles with close silica content and different grafting degrees were prepared via mini-emulsion polymerization using 3-(trimethoxysilyl)propyl methacrylate(TSPM)modified silica/acrylate *** silica/polyacrylate composite particles were melt-mixed with unfilled polyacrylate(PA)resin to prepare corresponding silica/polyacrylate molded composites and the dispersion mechanism of these silica particles from the“guava-likecomposite particles into polyacrylate matrix was *** was calculated that about 110 silica particles were accumulated in the bulk of every silica/polyacrylate composite latex *** the solubility tests of silica/polyacrylate composite latex particles in tetrahydrofuran(THF)and the section transmission electron microscope(TEM)micrographs of silica/polyacrylate molded composites indicated that the grafting degree of silica particles played a crucial role in the dispersion of silica/polyacrylate composite particles into the polyacrylate *** the grafting degree of polyacrylate onto silica was in a moderate range(ca.20%-70%),almost all of silica particles in these“guava-likecomposite particles were dispersed into the polyacrylate matrix in a ***,at a lower grafting degree,massive silica aggregations were found in molded composites because of the lack of steric *** a greater grafting degree(i.e.,200%),a cross-linked network was formed in the silica/polyacrylate composite particles,which prevented the dispersion of composite particles in THF and polyacrylate matrix as primary particles.