The Innovative Research Methodology of Tribological and Rheological Properties of Lubricating Grease

The article presents the methodology of tribological and rheological research of typical lubricating composition. The analysis of friction factor, friction work, frictional force, frictional power values during the test for the tested lubricating composition indicates a significant change in this parameters for lubricants. A change of the value of evaluated tribological parameters leads to a change in the structure of the composition carried out tests and a change in the effectiveness of the tribological protection of the tribosystem. The content of the thickener, base of oil and additive in the lubricant structure affects the level of the anti-wear properties, as evidenced by the results obtained during the tribological tests presented in this article. The DWS (Diffusing Wave Spectroscopy) technique provides the ability to obtain information about the viscoelastic state of non-Newtonian liquids and provide the monitoring of structural changes in time. The observation of the movement of the dispersed phase particles and the evaluation of the microstructure change in the solutions based on the results of the correlation function MSD (Mean Square Displacement) in time, complex viscosity, complex modulus and the research of the G 'and G” modulus in wide frequency range provides a comprehensive microstructure characteristic of the tested systems at the microscopic level.