Other Aspects of Emulsion Polymerization

Other Aspects of Emulsion Polymerization.—McCarvill and Fitch - have recently published three papers concerning the preparation of model polystyrene latices whose particles have surfaces which are well-defined as regards the nature of the ionic groups which confer colloid stability upon the latices. Various initiating systems were used, such as bisulphite-iron(iii), and persulphate-bisulphite-iron(ii), (m). 

Schepetil nikov, V. I. Eliseeva, and A. V. Zuikov, Vysokomol. Soedinenlya, 1978, 

Sarkisyan, and S. S. Gevorkyan, Mezhvuz. Sb. Nauchn. Tr.-Erevan. Politekh. Inst., 

Some interest continues to be shown in the matter of the aqueous-phase polymerization of butadiene catalysed by metal compounds. Two papers by Georgiev et are concerned with this topic. In the first of these, kinetic 

Georgiev, I. Mladenov, P. Atanasov, and K. Evlogieva, Cod. Vissh. Khim.-Tekhnol. Inst., Sofia, 1977,22,167. 

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A single surfactant may satisfy all three roles, or there may be a requirement for multiple surfactants. The optimum choice of surfactant for one role may produce undesirable performance in other roles, and there may be positive or negative synergism exhibited when multiple surfactants are used. As with many other aspects of emulsion polymerization, a compromise is often required in the choice of surfactant. 

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