in which methyl methacrylate(MMA) emulsion pdymefization constituents(EPC)were drop—wisely added to styrene(St)suspension polymerization system
was applied to prepare polystyrene—poly(methyl methacrylate)(PS—PMMA)cole-shell composite particles with a great size The composition of these composite particles was analyzed by FTIR.extraction.1H-NMR and13C-NMR methods.It was found that the molar ratio of MMA/St units in composite particles increased and the content of PMMA latex particles decreased with the increasing of polymerization time after the addition of EPC.So
it was evidenced that PMMA latex particles would coagulate with PS suspension particles in SECP polymerization and a transfer process existed between the two kinds of particles after the coagulation The polymeric composite particles were composed of PS