RESEARCH OF ELASTOMERS PROPERTIES BASED ON COMBINATION OF ISOPRENE AND NITRILE BUTADIENE RUBBERS

A.A. Dyakonov, S.A. Tapyev, A.A. Okhlopkova, S.A. Sleptsova, N.N. Petrova, P.V. Vinokurov, A.K. Kychkin, N.F. Struckov
 DOI: 10.25699/SSSB.2021.37.3.003 Download PDF
Abstract: The use of rubber products in the extreme conditions of the North creates a number of scientific and technical problems associated with their trustworthiness and reliability. The main reason of equipment failure during operation at low negative temperatures is the performance loss of sealing rubbers due to low frost resistance. One of the ways to solve this problem is the development of rubber compounds based on two or more types of rubber with high values of frost and aggression resistance. This article presents research results of elastomers based on a combination of isoprene rubber IR and nitrile butadiene rubber NBR. As a result, it was discovered that at different ratios of IR and NBR rubbers in a rubber compound, there is a change in the elastic-strength properties of elastomers, resistance to hydrocarbon media, elastic modulus, hardness, density, residual compression deformation and wear resistance. In the research of differential scanning calorimeter, two glass transition temperatures were identified as rubbers based on a combination of rubber. Using electronic microscope, images were obtained in the volume of samples, which is the phase morphology of rubbers is observed, which is depending on ratio of rubber in the mixture is more specific for nitrile butadiene or isoprene rubber. It was also noted that the friction surface of rubber based on NBR has the roughest structure compared to rubber with a high content of IR rubber.
Index terms: nitrile butadiene rubber, isoprene rubber, frost resistance, aggression resistance, wear resistance.

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