Studies in Interaction of Additive and Base Stock

Publisher Website
Google Scholar
Abstract
Three lines of study are described which aim at understanding the beneficial effect found when solvent (base stock) and additive match. Using the mercury squeeze apparatus, and also a dynamic modification of it, it is shown that the surface film is thicker and stronger at exact chain match. The phenomenon can, therefore, be explained as a thick film effect. The third method uses the Bowden-Leben machine which enables the surface thermodynamics of the system to be studied. A peak in heat of adsorption change and of entropy change also occurs at the match point. It would seem, therefore, that the foundations of the film are stronger here and this enables a firmer film to be built into the fluid. The chain matching, therefore, affects both the primary monolayer, as well as subsequent layers.

This publication has 8 references indexed in Scilit: