A novel method for preparing monodispersed polystyrene nanoparticles

作     者：LIU Kaiyi WANG Zhaoqun 

作者机构：Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China 

出 版 物：《中国高等学校学术文摘·化学》 (FRONTIERS OF CHEMISTRY IN CHINA)

年 卷 期：2007年第2卷第1期

页      面：17-20页

学科分类：07[理学] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Grant .90205015 and 50533020) 

主　　题：polystyrene nanoparticle monodispersity,microemulsion polymerization,monomer-added procedure 

摘      要：A preparation manner for monodispersed polystyrene(PS)nanoparticles polymerized by using a novel addition procedure of a monomer is *** systems containing a smaller amount of surfactant compared with conventional microemulsion polymerization,the polymerization processes consists of three stages:adding dropwise the first part of the monomer for a few minutes at 80℃ and polymerizing for 1 h;adding collectively the residual part of the monomer and polymerizing at the same temperature for another 1 h;and then polymerizing at 85℃ for another 1 *** on discussions on the nucleation mechanism of particles in the polymerization system,the influences of monomer weight added dropwise,and amounts of initiator and emulsifier on the size and distribution of PS particles were *** nanoparticles with smaller diameter such as a number-average diameter of 18.7 nm and better monodispersity were obtained since the dropped styrene amount was suitable under 20wt-% emulsifier amount and 3wt-% initiator amount based on the monomer.