By the emulsion polymerization process

organic polymers carrying functional groups have been involved in the elaboration of the hybrid latex in order to imporve the chemical bonding between the organic and inorganic components.The organic-inorganic hybrid nanoparticles have been synthesized using 3-trimethoxysilyl propyl methacrylate (MPS) by this method in our previous work.In the emulsion polymerization process of MPS and styrene

the partition of MPS in each phase of the emulsion not only influenced the free radical polymerization rate and the chemical composition of the copolymer

but also influenced the hydrolysis_condensation ractions of SiOR groups in MPS. The emulsion stability and the organic_inorganic hybrid microstructures largely depended on it also.In this paper

the MPS partition behavior is characterized by gas chromatography (GC)

and the partition coefficients are also measured.It is found that the system becomes saturated when the MPS amount is about 11 wt% of polymer seeds

and most MPS are parted in the polymer phase.Through theoretical analysis and experimental approving

it was found that the MPS partition behavior didn't change with the particle size and chemical composition of polymer seeds

and the saturated concentrations of MPS in each phase were increased with the temperature.