Citation:
WANG Dong-Sha, LIU Yan-Jun. Mono-dispersed Cross-linked Polystyrene Micro-spheres Prepared by Seed Swelling Polymerization Method[J]. Chinese Journal of Applied Chemistry,
;2007, 24(11): 1289-1294.
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A two-step swelling procedure was adopted to synthesize mono-dispersed and high cross-linked poly(styrene-divinylbenzene) particles with polystyrene micro-spheres(1.80 μm in diam), which were prepared by a dispersion polymerization method and used as seeds. The effects of monomer concentration, the ratio of ethanol to water, swelling agents, crosslinking agents, swelling temperature and agitation speed to particle size were discussed in detail. The morphologies and size distributions of these micro-spheres were examined by SEM and PSA. The Tg of the micro-spheres was tested by DSC. The results indicate that the particles(6.20 μm in diam) exhibited excellent mono-dispersed property and high crosslinking degree when the conditions were that the concentration of the swelling agent and crosslinking agent was 25% and 23%, the swelling temperature was 30℃, and the stirring speed was 150 r/min.
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