The monodisperse copolystyrene-divinylbenzene crosslinked microsphere with diameter more than 3μm has been synthesized by improved seed polymerization. The monodisperse polystyrene seeds with diameter 1-2μm were obtained by emulsifier-free polymerization. And the effects of swelling conditions such as the swelling temperature
the volume ratio of swelling agent to seed emulsion
swelling time and the crosslinking agent
the small molecular compound
the emulsifier on the particle size and the particle size distribution have been studied.