Synthesis and Properties of Polystyrene-acrylate Emulsion Modified by Organic Fluorine

An organic fluorine modified polystyrene-acrylate emulsion was synthesized by a semi-continuous process with fatty alcohol poly(oxyethylene ether)/sodium dodecyl sulfate/Non-ionic fluorine containing surfactant(OP-10/SDS/DF-10) as an emulsifier system.The structure and latex particles of the copolymers were characterized by IR and TEM.The influence factors including the content of fluorine-containing methyl acrylate and fluorocarbon surfactants on the emulsion were investigated.The effects of the factors on the rate of monomer conversion and the stability of the emulsion were also studied.It was shown that the rate of monomer conversion was 99.6% when the polymerization temperature was 75～80 ℃ and the reaction time was 4.5～5 h when the mass fraction of organic fluorine was only 0.67% and that of DF-10 was 1.35%.