The role of acid-base interactions in the formation of polymer-metal adhesive joints

A new method for determining the surface acidity of polymeric and metal materials is described. The modified Berger method is used as a prototype. The influence of thermal treatment on the acidity parameters of a metal surface is established. The importance of exact determination of the acidity parameters for different solid surfaces is demonstrated, and the possibility of its effect on the value of the strength of adhesive joints is studied. It is shown that, when conditions of the production process are varied, it is possible to increase the adhesive strength. Low-and high-density polyethylenes are used as coatings; brass and titanium, as substrates. The results will be useful for the development of coatings of various types, including those with polyolefins.