科研之友
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摘要
Monodisperse and anion-charged polystyrene (APS) microspheres were prepared by dispersion copolymerization of styrene (St) and hydroxyethyl acrylate (HEA) in the absence of a stabilizer. The copolymerization were initiated by potassium persulfate and conducted in methanol/water. The effect of HEA amount, methanol/water ratio and initiator concentration on the average diameters and coefficient variations of anion-charged microspheres were systematically investigated, and the copolymerization. The results indicated that monodisperse and anion-charged microspheres could be prepared by stabilizer-free dispersion copolymerization. The larger particle size and better monodispersity of the microspheres could be obtained with increasing HEM content or the volume ratio of methanol in media. Moreover, hydrophilic properties of HEA and residual groups of initiator played an important role in stabilizing the. dispersion copolymerization. Overall, the present manuscript provided a simple route to generate monodisperse polymer microspheres with anionic groups on the surface.
