INFLUENCE OF TYPE OF VULCANIZATION SYSTEM AND VULCANIZATION ACCELERATOR ON PROPERTIES OF POROUS RUBBERS

doi: 10.25712/ASTU.2072-8921.2021.03.026

Abstract

The objective of this work is to determine the influence of the type of sulfur vulcanizing system for porous rubbers, for which purpose we have produced and examined rubber compounds and vulcanizates with the addition of three different vulcanization accelerators. According to the results of our study, we were able to obtain vulcanization characteristics of the rubber compounds and demonstrate vulcanization curves. In addition, we have determined such indicators, as the thermal conductivity coefficient, apparent density, compression resistance, and the degree of equilibrium swelling of the produced porous rubbers. It was found out that the obtained samples of porous rubbers became lighter (apparent density) by 8-40 % compared to the reference sample. It was revealed that N‑cyclohexyl-2-benzothiazolsulfenamide should be chosen as a vulcanization accelerator for porous rubbers, since it shows a slower rate during the induction period and a greater activity in the further vulcanization process. It is worth highlighting the semi-efficient vulcanization system as a suitable vulcanizing system for porous rubbers, since the apparent density of the sample produced according to this method would be both noticeably lower compared to that of a sample obtained with the use of the conventional vulcanizing system and only slightly higher relative to a sample obtained with the use of an efficient vulcanizing system.