Journal of Colloid and Interface Science, Vol.201, No.2, 247-249, 1998
Tentative correlation between contact angle hysteresis and adhesive performance
In this work, the surface properties and adhesive performances of three ethylene vinylacetate copolymers are investigated. A tentative correlation between the evolution of the contact angle hysteresis and the variation of the adherence force is proposed. The wettability measurements results indicate that one of the EVA possesses a very low surface energy, explained by the presence on the surface of an additive. This copolymer exhibits, however, the greater contact angle hysteresis and the higher adherence level. This behavior can be explained by the probable merging of some polymer chains on the surface, through the contamination layer, and by a possible increase of the polymer energy dissipation properties induced by the presence of the additive molecules.