Home – Home – Jornals – Chemistry for Sustainable Development 2023 number 1

The influence of various technological additives on the plastic and rheometric properties of a rubber mixture is investigated, physical-mechanical and performance characteristics of rubber based on a combination of SKN 4055 nitrile butadiene caoutchouc and Therban 3406 hydrogenated nitrile butadiene caoutchouc are assessed. The rubber mixture included SKN 4055 and Therban 3406, curing agent Luperox F-40P, antioxidant Diaphene FP, fillers: burnt magnesia, carbon black T 900 and P 514, oligoester acrylates TGM-3, MGF-9, and other ingredients. We used Z-50, Z-60, Struktol WB-222, Kvalistrol A-100, B-70 and B-70-20 as technological additives. The rubber mixture was made on laboratory rolls LB 320 160/160, then vulcanized at 150 °C for 60 min and thermostated at 160 °C for 3 h. Studies of the plastic and rheometric properties of the rubber compound, the physical and mechanical properties of vulcanizates were carried out in accordance with the standards existing for rubber industry. The study of thermo-aggressive resistance of vulcanizates was carried out by determining the change in their physical-mechanical parameters after 1 day exposure to air and standard liquid SZhR-1 at a temperature of 150 °C. It is found that the introduction of technological additives leads to improvement in the distribution of ingredients, as well as in the plastoelastic and rheometric properties of the rubber mixture. Rubber containing Kvalistrol B-70-20 has increased physical and mechanical properties, exhibiting the least changes after exposure to aggressive media.