Fatigue and Hysteresis Properties of Rubbers Using Iron Oxide Filler, Obtained by Improved Testing Methods in Different Loading Conditions

Abstract

The article summarizes the results of earlier works performed by the same team of authors on the study of the effect of iron oxide filler (IFO) on the properties of rubber for solid tires. The kinetics of vulcanization was studied on a rotorless rheometer MDR 3000 Professional (MonTech, Germany) and plastoelastic properties on a Plastimeter RP300 (MonTech, Germany). Fatigue tests were carried out on
UR-500 machines according to GOST 270-75 and in the FAT mode (sign-alternating bending with rotation) on dumbbell-type specimens to GOST10952-75. Weller curves are constructed in three modes: given strains, given stresses, and given strain energy densities. It is shown that the technological, elastic-strength, hysteresis and fatigue characteristics of the studied rubbers with LOH are not inferior, and sometimes even exceed the standard rubbers in these indicators. A model of macro-enhancement is proposed, which makes it possible to partially explain the amplifying properties of LOH, despite the fact that its particles are large, up to 10 μm. Taking into account the low cost of the JON, a conclusion was made about the effectiveness of the proposed filler and recommendations were given for bench testing of finished products – solid tires.