SYNTHESIS OF CORE-SHELL TYPE MICROSPHERE WITH REACTIVE SEED MICROSPHERES

Monodispersed poly(methyl methacrylate) (PMMA) particles(seed microsph eres) were synthesized with the living radical initiators, tetramethyl thiuram disulfide, or p-xylene dimethyldithiocarbamate by suspension p olymerization in water media with and without divinyl benzene as a cro sslinker. Monodispersed spherical microspheres with PMMA core-polyacry lamide shells were synthesized by UV irradiation to the seed microsphe re-acrylamide aqueous solution. The content and the molecular weight o f the polyacrylamide shell chain were controlled by changing the acryl amide feed and irradiation time of the UV light. The microspheres beca me dispersible to water after the UV irradiation. (C) 1998 John Wiley & Sons, Inc.