Preparation and Characterization of Cross-Linked Chlorinated Polystyrene Microspheres

The research and application of polymer microspheres have developed very fast in recent years. Especially the polymer microsphere with large size has been widely applied in many fields, such as standard measurement, information, medicine, immunity, biochemistry etc. Meanwhile, cross-linked mono-disperse microspheres are of more extensive application prospect, because of their good adsorption properties, mechanical properties. The topic of this thesis, belonging to the field of polymer microspheres, is about the preparation of 30-50 mu m cross-linked chlorinated polystyrene microspheres. Adopting the method between dispersion polymerization and suspension polymerization, PS, CMS as the monomers, AIBN as initiator, DVB as cross-linker, ethanol and water as the reaction medium, cross-linked chlorinated polystyrene microspheres can be prepared. Then the microspheres were detected by infrared and the morphology was observed by SEM. Through the polymerization parameters on particle size and size distribution of the study, this issue determines a recommended formula for 30-50 mu m cross-linked chlorinated polystyrene microspheres.