DeBruyne, adhesion rule

We develop certain aspects of the adsorption theory of adhesion more fully than has been done previously, based solely on (free) surface energetics, and show how they can be applied to real or practical systems. As a consequence, it is shown that the deBruyne adhesion rule [7] is incorrect in part. Our concern is mainly with what we believe to be the most important problem in the making of adhesive bonds—that is, the achievement of extensive and proper (no intermediate phase) interfacial contact. We discuss also the breaking strength of certain adhesive joints where this is necessary to the development of our thesis. However, the processes of making and breaking adhesive joints bear no... 

The deBruyne adhesion rule states [7] "Provided we use pure or simple substances as adhesives then there is a good deal of evidence that strong joints can never be made by polar adherends with nonpolar adhesives or to nonpolar adherends with polar adhesives." It is possible to support the portion of the rule which deals with nonpolar adherends and polar adhesives on the basis that polar adhesives generally have higher surface free energies than nonpolar adherends, and therefore will wet them very poorly [27]. It is not possible, however, to support the other portion of the rule which deals with polar adherends and nonpolar adhesives, since the surface energetics are favorable in this instance and spreading should result. This portion of deBruyne s adhesion rule must, therefore, be incorrect. That it is incorrect is further... 

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