Structural component of disjoining pressure

It is shown that using an approach of pair additive interaction of particle s, relationships may be derived from the fundamental principles to describe the structural component of disjoining pressure of thin films Pi, both in the case of small, medium and large thicknesses H. In the case of small thi cknesses, in full agreement with the experiment, both oscillations and a gr adual exponential decrease in disjoining pressure become possible. In the c ase of medium and large thicknesses, the structural component of disjoining pressure changes by the Pi similar to H-3 and Pi similar to H-4 laws, resp ectively. It is shown that the short-range term of the structural component can stabilize thin films.