Analysis of the adhesion and adhesion strength of two-layer polymer films and coatings

The formation of adhesion bonds during the creation of two-layer polymer films and coatings capable of acid-base interaction is considered. The coatings are obtained from polymer solutions, and the second layer is formed from the polymer solutions and their mixtures on a hard polymer coating. As a result of absorption by the coating of a considerable amount of solvents (to 14%), polymer macrochains are able to approach one another at a distance necessary for the formation of acid-base (hydrogen) bonds and a transition layer. The polar component of the work of adhesion is equal to about 50% of the whole work W-a. There is no interrelation of the thermodynamic work W-a between the films and the work of their separation into layers. The main part of the external work upon the separation is spent (if strong donor-acceptor bonds are formed)for extracting the segments and macrochains of polymers out of the films.