ТЕРМОСТОЙКОСТЬ ПОСАДОК ПОДШИПНИКОВ КАЧЕНИЯ, ВОССТАНОВЛЕННЫХ ЭЛАСТОМЕРНЫМИ НАНОКОМПОЗИТАМИ

Abstract

The heat resistance of the polymer material for restoring bearing fits is its most important operational property. The thermal stability of nanocomposites when filling elastomers with nanoparticles varies ambiguously and depends on the type of rubber that is the basis of the elastomer. To restore bearing fits, fillers, in addition to copper nanoparticles, use aluminum nanoparticles, as well as carbon nanotubes in nanocomposites. The effect of carbon nanotubes and aluminum nanoparticles on the heat resistance of elastomers was investigated. The change in the deformation-strength properties of the F-40S elastomer and nanocomposites based on it before and after high-temperature aging was experimentally studied. Composition No. 1: F-40S elastomer – 100 mass parts, Taunit carbon nanotubes – 0.1 mass parts. Composition No. 2: F-40S elastomer – 100 mass parts, aluminum nanopowder – 0.075 mass parts. Samples were made in the form of polymer films. Thermal aging of the samples was carried out under conditions of limited oxygen access to air. The heat resistance of the nanocomposite of composition No. 1, in comparison with the F-40S not filled with elastomer, has increased. The aging coefficient of the nanocomposite in strength, in comparison with the unfilled elastomer, increased by 1.2 times, and in terms of deformation, it increased by 1.38 times. The aging coefficient of the nanocomposite composition No. 2 in strength, in comparison with the unfilled elastomer, increased by 1.17 times, and in terms of deformation, it increased by 1.2 times, which confirms the increase in its heat resistance. Experimental studies have established that the Townit-M carbon nanotubes and aluminum powder nanoparticles are inhibitors of the elastomer thermal oxidation process F-40S and therefore increase the heat resistance of nanocomposites based on it.