STUDY OF ELECTROPHYSICAL PROPERTIES OF RUBBER BASED ON NITRILE-BUTADIENE RUBBER AND CARBON TECHNICAL AS AN INTERLINING MATERIAL OF FLEXIBLE VARIABLE CAPACITIES

Electrophysical, rheometric and physicomechanical properties of rubber based on butadiene-nitrile rubber filled with technical carbon were studied for its application as sensitive elements of flexible variable capacities in sensors of remote pressure monitoring systems in automobile tires. Polytetrafluoroethylene, graphene and titanium dioxide were studied as modifiers of the electrophysical properties of rubber. The rubber mixture was prepared on laboratory rollers LB 320 160/160 at a roller surface temperature of 60-70 °C for 25 min. Rheometric properties of the rubber mixture were studied on a rheometer MDR 3000 Basic at 150 °C for 30 min in accordance with ASTM D2084-79. To determine the physical and mechanical properties, the rubber mixture was vulcanized at a temperature of 150 °C and a pressure of 18.2 MPa for 20 min in a P-V-100-3RT-2-PCD vulcanization press. The elastic strength properties of vulcanizates were determined in accordance with GOST 270-75; Shore A hardness – in accordance with GOST 263-75; tear resistance – in accordance with GOST 262-93; rebound elasticity – in accordance with GOST 27110-86. For rubber samples with a thickness of 0.3 to 1.5 mm with copper electrodes glued to both sides, the electrical capacity was measured and studied as a function of pressure on a TS-7 device. The specific surface resistance of the rubber samples was determined by the standard four-probe method on a Jandel RMS 3000 installation. It was found that rubber containing 10 parts by weight of titanium dioxide per 100 parts by weight of titanium dioxide. part butadiene-nitrile rubber, is characterized by increased electrical capacity and can be recommended as an interlining material for a variable capacitor of a pressure sensor in automobile tires. For citation: Smirnov A.V., Terentyev A.A., Balasanyan S.A., Egorov E.N., Kol’tsov N.I., Vasiliev S.A. Study of electrophysical properties of rubber based on nitrile-butadiene rubber and carbon technical as an interlining material of flexible variable capacities. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 9. P. 99-105. DOI: 10.6060/ivkkt.20256809.9y.