Abstract
A kinetic study has been made of the reaction of initiation and polymerization of styrene in emulsions stabilized by alkamones, varying the pH value of the medium. The initiation reaction was investigated by the inhibitor method. It is shown that the polymerization kinetics are determined by features of the initiation reaction and by the dispersity of the resulting latex. It was found that the propagation and termination rate constants are not functions of the pH of the medium. Polymerization rates were determined, calculating for a single latex particle. The greatly increased rates observed at high pH values are attributed to a higher radical concentration in the latex particles. Higher radical concentrations are observed solely for particles with a mean radius exceeding 500 Å.
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