Abstract: 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 Rp=K[M]^0.36[I]^0.49[E]^0.72 and apparent activation energy Ea=19.72 kJ/mol at 30 ℃. The molecular weight was measured by viscosity method in the range of 2×10⁶-4×10⁶.

Key words: Redox initiator system, Concentrated emulsion plymerization, Polystyrene latex, Kinetic equation, Stability$$$$