To investigate emulsifier-free copolymerization in the presence of a solid phase

copoly-merization experiments were carried out for the Styrene-Butyl Acrylate-K2S2O8-Water system by using barium sulfate powder

which is assumed to be chemically inert. Reactions were varied with respect to ranging barium sulfate powder quantity

initiator concentration and temperature. These factors were inquired into effect on reaction rate and conversion

polymer particle number and diameter

and latex stabililty.