Abstract
The tens of micrometers sized polystyrene(PS) microspheres were produced by dispersion polymerization in ethanol/H2O medium with poly(N-vinyl pyrrolidone) (PVP) as a dispersant and 2,2’-azobisisobutyronitrile(AIBN) as a radical initiator. The effects of PVP concentration and ethanol/H2O ratio on particle size and size distribution of PS microspheres were studied extensively. It was found that polystyrene microspheres with diameter 10-50μm were produced with 30wt% of St, 4wt% of AIBN, 3wt% of PVP and 97.5/2.5 ratio of ethanol/H2O, and narrow distribution of microspheres can be achieved by screening.
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