We consider the original method of comparative evaluation of volumetric energy density of the original cohesion of the polymer components and mixtures based on them, which allows not only qualitatively but also quantitatively characterize the level of compatibility of bulk polymers. The technique is based on a joint analysis of the physical and mechanical strength and elastic characteristics of the samples, allowing also consider the orientation effects arising under uniaxial tension. The results of such an analysis in a generalized form reflect the level of structural and dynamic stability (compatibility) of the elements of the ensemble of macromolecules any composition during and after exposure to mechanical forces.