THE COMPARATIVE ANALYSIS OF ECOLOGICAL LUBRICANTS

On the base of rheological tests, the resistance to deformation of lubricants elaborated on the base of Crambe
abyssinica seed oil was evaluated. The developed lubricants were subjected to thermal and mechanical
stresses, which allowed the evaluation of their resistance to the oxidation process and anti-wear properties.
After tests, the rheological properties of tested lubricants were carried out by determining the complex modulus
in oscillation tests. On the base of the rheological parameter, the resistance of lubricants to deformation and
change of this indicator under the influence of thermal and mechanical stresses was evaluated. The carried out
analysis of changes in the G* complex modulus showed that the tested lubricants show a different resistance
to deformation depending on their type and depending on the impact of the extortion. It was found that the
rheological index (complex modulus G*) determined in oscillation tests can be a successful criterion for the
quality of pro-ecological lubricants.

