FROST-RESISTANT RUBBER ON BASE OF COMBINATION OF BUTADIENE-NITRILE AND HYDRIN RUBBERS

Abstract

The influence of hydrin rubbers on the plastic-elastic, rheometric, physical-mechanical properties and frost resistance of oil-and-petrol resistant rubber mixture of B-14 type was studied. The study was carried out with the purpose of selecting the composition of the rubber mixture, which is resistant to low temperatures and has increased operational properties. The composition of the test rubber mixture with a sulfur vulcanization system consisted of butadiene-nitrile rubber BNKS-18AMN (copolymer of butadiene and acrylonitrile) and hydrin rubbers T-3000 and T-6000 (copolymers of epichlorohydrin, ethylene oxide, propylene oxide and allyl glycidyl ether), diphenylguanidine, zinc oxide, Agidol-2, technical carbon P 803, dibutyl sebacate and other ingredients. Rubber mixture was prepared by mixing caoutchoucs with ingredients on lab rolls LB 320 150/150. For the rubber mixture variants, the elastomeric properties on the viscosimeter MV 3000 and the vulcanization characteristics on the rheometer MDR 3000 of firm «Mon Tech» were investigated. The rubber mixture was vulcanized in a two-storey hydraulic electrically heated press VP-400-2E at a temperature of 150 °C for 40 min. Studies of the elastic-strength properties of rubber were carried out in accordance with the standards existing for the rubber industry. The frost resistance of rubber was investigated by determining the temperature limit of brittleness and by of method differential scanning calorimetry. The study of thermo-aggression resistance of vulcanizates was carried out by determining the change in their elastic-strength properties after prolonged thermal exposure to air and standard liquid SZHR-1, as well as changes in volume and mass after aging in technical oil AMG-10. As a result of the research it was established that the rubber mixture based on the combination of BNKS-18AMN and T-6000 rubbers can be used for the manufacture of frost-resistant rubber products and sealing elements for oil and gas industries that can work at elevated temperatures with improved elastic-strength and operational properties.Forcitation:Ushmarin N.F., Egorov E.N., Koltsov N.I. Frost-resistant rubber on base of combination of butadiene-nitrile and hydrin rubbers. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 8. P. 60-64.