ADHESION AND SURFACE-HYDROGEN-BOND COMPONENTS FOR POLYMERS AND BIOMATERIALS

In this paper, we briefly discuss several ways to determine the work o f adhesion and the requirements for achieving maximum adhesion and spo ntaneous spreading. Specifically, we will concentrate on the methodolo gy developed by van Oss, Chaudhury and Good [5-7] for the determinatio n of the work of adhesion and interfacial tension. Recently, Good [4] has redefined the surface interaction components gamma(+) and gamma(-) as hydrogen bond acidic and basic parameters. We have related the sur face-hydrogen-bond components gamma(+) and gamma(-) to the Taft and Ka mlet's [28,29] linear solvation energy relationship (LSER) solvatochro mic alpha and beta parameters. We [28,29] have found that, for water a t ambient temperature, alpha hydrogen-bond-donating (HBD) ability] and beta[ [hydrogen-bond-accepting (HBA) ability] are not equal, and the ratio for the normalized alpha and beta is 1.8. This new ratio is assu med to be equal to that of gamma(+) & gamma(-) for water at 20 degrees C. On the basis of the new ratio, we will present our recalculated su rface-hydrogen-bond components for several polymers and biomaterials. This change in the ratio did not affect the total surface tension or t he sign of the interfacial tension. The net improvement is in the lowe ring of the gamma(-) values. These data may be useful for predicting t he adhesion between an adhesive and an adherend.