Study of the process of structuring styrene-butadiene rubber with the participation of ethylphenylsilylcarbamide and 2-amino-4,6-bis(trichlormethyl)silyl triazine

The role of a new class of active low-molecular compounds, ethylphenylsilylcarbamide and 2-amino-4,5-bis-trichloromethylsilyl triazine, as an accelerator of crosslinking and vulcanization of styrene-butadiene rubber has been studied. In the systems styrene-butadiene rubber-30 + ethylphenylsilylcarbamide + ZnO, styrene-butadiene rubber-30 + 2-amino-4,5-bis-trichloromethylsilyl triazine+ZnO, it has been found that the introduction of ethylphenylsilylcarbamide significantly improves the rheological and structural parameters of these systems. First of all, ethylphenylsilylcarbamide was synthesized. The yield of the final product was 86 %. The process of crosslinking styrene-butadiene rubber was carried out in the presence of ethylphenylsilylcarbamide. To protect the mixtures from oxidation and destruction of polymer chains during mechanical plasticization, the antioxidant 2-amino-4.6-bis(trichloromethyl)-sulfonyl triazine was used, and to accelerate the process of crosslinking of styrene-butadiene rubber – ZnO. A polymer plasticizer (a mixture of polyvinyl chloride and petroleum oil) was used as a plasticizer. Using physicochemical and spectral methods, changes in the molecular structure and spatial networks of styrene-butadiene rubber in the presence of ethylphenylsilylcarbamide and 2-amino-4,5-bis-trichloromethylsilyl triazine and zinc oxide were determined. The yield of crosslinking and the occurrence of the number of active chains of the network in the elastomer were found for each studied system depending on the crosslinking time. By determining the transformation of butadiene-styrene rubber, the radical mechanism of the crosslinking reaction was confirmed by FTIR and EPR spectroscopy. It was found that the introduction of low-molecular additives of polymer plasticizer and technical carbon provides physical and mechanical properties, as well as effective protection of elastomer materials from temperature aging. According to the results of the studies, it was evident that the plasticization of the elastomer increases with an increase in the number of polar groups (N, NH, Cl, Si) in the composition.