HYDROCHLORIC ACID PHENAZINE IN THE TECHNOLOGY OF PRODUCTION OF EMULSION RUBBERS

Abstract

The proposed work is devoted to improving the stage of formation of crumbs of emulsion butadiene-styrene synthetic polymer. For the first time, an organic compound containing two nitrogen atoms – phenazine hydrochloride – was used to isolate rubber from latex. The effect of this salt was compared with previously studied flocculants such as sodium chloride, N,N-dimethyl-N,N-diallylammonium chloride and a polymer based on it. The study found that the consumption of phenazine hydrochloride to separate 1 ton of rubber was 2.5 kg, which is close to the amount of polymer cationic flocculants introduced into the technological process of extracting rubber from latex. In previous studies, it was noted that the consumption of organic compounds containing one nitrogen atom in their structure is almost 10 times higher than the consumption of polymer cationic electrolytes. The use of this product is of more theoretical importance, as it allows one to expand information on the stability of dispersed systems to electrolytes of different natures. The temperature regime for the release of rubber from latex was maintained at a given level - 20 °C. The consumption of sulfuric acid in all considered cases was kept constant - 15 kg/t of rubber. Low costs of a coagulating agent can ensure the creation of a closed technological cycle on an industrial scale. This will reduce water consumption by workshops producing emulsion polymerization rubbers and reduce the environmental risks of their production. The results of testing rubbers and vulcanizates based on them showed that the main physical and mechanical indicators comply with the regulatory requirements of GOST and TU.