Abstract
The present research work concerns the thermodynamic study of lithium grease production by reaction calorimetry. In addition, several thermoanalytical techniques such as DSC and rheology were employed to highlight grease thermal events. The results showed that the cooling rate mainly controls the crystallization of soap fibers and the formulation influences the reaction heat of saponification. The liquid fraction method (LFM) has been evaluated for both simple and complex lithium greases as a substitution technique to dropping point. For Lithium grease, the results showed a very good correlation between LFM data and standard dropping point measurements. On the other hand, the LFM method was not applicable to complex lithium soap for dropping point determination by DSC, while it was shown that shear strain sweep led to a good correlation with dropping point values.
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