Table of Contents
Journal of Polymers
Volume 2013, Article ID 754687, 7 pages
http://dx.doi.org/10.1155/2013/754687
Research Article

Growth Kinetics of Monodisperse Polystyrene Microspheres Prepared by Dispersion Polymerization

1Department of Chemistry, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
2Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China

Received 26 March 2013; Accepted 26 May 2013

Academic Editor: Alain Durand

Copyright © 2013 Fan Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Dispersion polymerization has been widely applied to the synthesis of monodisperse micron-sized polymer colloidal spheres. Many efforts have been devoted to studying the influence of initial conditions on the size and uniformity of the resultant microspheres, aiming to synthesize micron-size monodisperse colloidal spheres. However, the inner contradiction between the size and the size distribution of colloidal spheres hinders the realization of this goal. In this work, we drew our attention from the initial conditions to the growth stage of dispersion polymerization. We tracked the size evolution of colloidal sphere during the dispersion polymerization, through which we established a kinetic model that described the relationship between the monomer concentration and the reaction time. The model may provide a guideline to prepare large polymer colloidal spheres with good monodispersity by continuous monomer feeding during the growth stage to maintain the concentration of monomer at a constant value in a dispersion polymerization process.