Polymerization of vinyl acetate in aqueous media. Part IV. Influence of preformed (“seed”) latex upon polymerization kinetics and particle size

The polymerization of aqueous solutions of vinyl acetate initiated by K 2 S 2 O 8 , has been studied in the presence of different concentrations of a fine “seed” latex, both in the absence and in the presence of a surfactant (sodium hexadecyl sulfate). Both kinetics and final latex size were measure...

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Bibliographic Details
Published in:Journal of polymer science. Part A-1, Polymer chemistry Polymer chemistry, 1970-02, Vol.8 (2), p.407-413
Main Authors: Netschey, A., Alexander, A. E.
Format: Article
Language:English
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Summary:The polymerization of aqueous solutions of vinyl acetate initiated by K 2 S 2 O 8 , has been studied in the presence of different concentrations of a fine “seed” latex, both in the absence and in the presence of a surfactant (sodium hexadecyl sulfate). Both kinetics and final latex size were measured, the latter showing whether fresh nucleation had occurred or not. The results suggest that surfactant adsorbed on the latex surface greatly influences the capture, by the latex surface, of oligomers formed in the aqueous phase and this, in turn, markedly affects both nucleation and kinetics. The number of free radicals per particle does not appear to be constant even with the finest particles used (ca. 50 mμ).
ISSN:0449-296X
1542-9350
DOI:10.1002/pol.1970.150080212