Research of frost-resistant rubber for seals

Abstract

Abstract As a result of experimental studies, the dependencies of the static modulus of elasticity of the five rubber compositions during bending on the temperature in the range from - 70 to +100°C were established. The results of the temperature test simulating the change in contact stresses in the seal after installation at 20°C and subsequent cooling, as well as the temperature test, when the bending deformation is increased after cooling, are also presented. The dependences of the coefficient of friction of rubber on fluorine-containing coatings of three types and steel were experimentally obtained in a wide range of negative and positive temperatures. The design of the test bench for studying the elastic moduli during bending of rubber and polymer samples in a wide range of bending deformations and temperatures and the test procedure for it is described. A methodology for studying the coefficient of friction of rubbers during friction on fluorine-containing coatings and steel in a wide temperature range is presented. Friction coefficients were determined during unilateral rotational motion of flat samples at a sliding speed of 0.2 m/s, pressures on the friction surface from 0.8 to 50 MPa and a temperature range from -40 to + 120°C.