Abstract
The dispersion polymerization of methyl methacrylate (MMA) has been carried out using polystyrene- block-poly(4-vinylpyridine) copolymer [P(S- b-4VP)], which was prepared by a reversible addition–fragmentation chain transfer (RAFT) method, as a steric stabilizer in an alcohol media. The stable polymer particles were obtained when the block copolymer concentrations increased from 1 to 10 wt% relative to the monomer and the average particle sizes decreased from 5.3 to 3.4 μm with the increasing concentration of the block copolymer. In particular, the incorporation of 2 wt% polystyrene- block-poly(4-vinylpyridine) produced 4.3 μm of monodisperse PMMA particles with 2.14% of C v. Thus, the P(S- b-4VP) block copolymer prepared by the RAFT method is working not only as a steric stabilizer, but also in providing monodisperse micron-sized PMMA particles.
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