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Emulsifier-free emulsion polymerization of styrene in the presence of β -hydroxy propyl acrylate was studied. The emulsifier-free self cross linked polystyrene latex microspheres was obtained. Monomer conversion is higher than 90% when [St], [β-HPA], [KPS] is 2. 66, 0. 228, and 5. 8×10-3 mol/L respectively under 80℃ for 5h. The mono-dispersed latex particle diameter and colloidal particle concentration were given N = 3. 13×1013/cm3 by TEM analyse. The factors of influencing latex stability were discussed. Thecopolymer was characterized by IR and dissolution experiment. The apparent activation energy of polymerization and polymerization rate constant were obtained to be 78. 7KJ/mol and 514. 4L/mol·s respectively.
Emulsifier-free emulsion polymerization of styrene in the presence of β -hydroxy propyl acrylate was studied. The emulsifier-free self-cross-linked polystyrene latex microspheres was obtained. Monomer conversion is higher than 90% when [St] The mono-dispersed latex particle diameter and colloidal particle concentration were given N = 3. 13 × 1013 (KPS) was 2.66, 0.228 and 5. 8 × 10-3 mol / L under 80 ℃ for 5h. / cm3 by TEM analysis. The factors of influencing latex stability were discussed. Thecopolymer was characterized by IR and dissolution experiment. The apparent activation energy of polymerization and polymerization rate constant were obtained to 78. 7 KJ / mol and 514. 4 L / mol. s respectively.