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

摘要

The formation of adhesion links during the creation of two-layer polymer films and coatings capable of acid-base interaction is cqnsidered. The coatings are obtained from polymers Solutions, and the second layer is formed from the polymers Solutions and their mixtures on a hard polymer coating. As a result of absorption by the coating a considerable amount of solvents (to 14 percent), polymer macrochains are able to approach one an-other at a distance necessary for the formation of acid-base (hydrogenous) bonds and a transitional layer. The polar component of the work of adhesion is equal to about 50 percent of the whole work W_a. There is no correlation between the thermodynamic work W_a be-tween the films and the work of their Separation into layers. The main part of the external work upon the Separation is spent for extracting the segments and macrochains of polymers out of the films.