Investigation of the process of latex coagulation by cationic surfactants

Abstract

In the article the estimation of coagulating ability using cationic electrolytes is shown. It was found that in the case of using low molecular weight cationic electrolyte, the completeness of the release of rubber from latex is achieved at their consumption of 20–30 kg/t of rubber. A feature of the behavior of cationic surfactants in the latex coagulation has been established. It is shown that the consumption of cationic surfactants corresponds to the consumption of polymer cationic electrolytes. Also, a hypothesis was put forward that cationic surfactants violate the aggregate stability of latex systems and the mechanism of action, which is based on the interaction of cationic surfactant micelles with latex globules carrying anionic surfactants on the surface is proposed. The use of cationic surfactants can eliminate the use of sodium chloride in the industry of separating emulsion styrene-butadiene rubber from latex, as well as solve some environmental problems. The final stage of the investigation was to determine the parameters of rubber compounds and vulcanizates based on the rubber. These rubbers, rubber compounds and vulcanizates correspond to standard parameters.