Grease material properties from first principles thermodynamics

Thermodynamics has historically been used to derive characteristic material properties. In this study, fundamental thermodynamics is applied grease. First-principle formulations of existing properties—heat capacity and storage modulus—and new properties—thermal strain stress coefficients, chemical resistance thermo-chemical decay coefficient—are derived, some which are experimentally determined. A group Maxwell relations introduced by replacing the classical compression work PdV $$ with grease shearing Vτdγ V\tau d\gamma . The physical interpretations implications these properties on behaviour performance presented. Experimental measurements derived performed in accordance theoretical formulations. Six different types studied. Obtained results shown conform anticipated, observed established behaviours. proposed can be degradation analyses, as well selection for lubrication applications.