Keyword: «butadiene-nitrile rubber»

The results of the study of the effect of hydrocarbon media (industrial hydraulic oil brand I-20A and all-season universal semi-synthetic engine oil Gazprom Neft Diesel Premium 10W-40), and ambient temperatures on the properties of mass-produced rubber brand 98-1 are presented. The samples were exposed under the constant influence of low temperatures, indoors at a temperature of 20–23oC and with a cyclic temperature change in order to simulate the operation of equipment in garage storage conditions. It has been established that at room temperature and under conditions of cyclic temperature changes, the greatest changes in indicators occur, which is due to the intensive course of diffusion processes in contact with rubbers with hydrocarbon media. At full-scale exposure under the influence of low temperatures, the change in properties is minimal.

The content of 1,2-links in the butadiene fragment of butadine-nitrile rubbers was calculated, the temperatures of the glass transition of rubbers and rubbers based on them were determined. Using the Pearson correlation, it is shown that the mobility of macromolecules of butadiene-nitrile rubbers is de-termined not only by the content of bound acrylоnitrile, but also by the microstructure of the butadiene link. It was found that with an increase in the content of bound acrylonitrile, the change in glass transition tem-peratures between rubber and rubber based on it decreases as a result of vulcanization.