Concentrated emulsion polymerization of the styrene initiated by redox initiator system at lower temperature

Polystyrene latex particles were prepared by concentrated emulsion polymerization by using CHPO-TEPA as the redox initiator system and SDS-CA as the surfactants. The effects of polymerization condition on the polymerization process were investigated. The effects of surfactant, initiator, temperature and monomer's volume fraction on the stability of emulsion, the kinetic process of polymerization and the average size of PS latex particles were discussed. The morphology and size of PS particles were obtained by TEM. The kinetic equation R-p=K[M](0.36) [E](0.72)[I](0.49) and apparent activation energy E-a = 19.72 kJ/mol at 30 degreesC. The molecular weight was measured by viscosity method in the range of 2 X 10(6) - 4 X 10(6).