Polymeric surfaces of polyvinylchloride and polymethylmethacrylate were found to be unsuitable when considered to be monopolar. The acid-base properties of these polymers were studied by using the Berger method, and their composition was analyzed by IR-spectroscopy and quantum chemical analysis. In order to determine the acidity and basicity parameters of the surface free energy (SFE) of smooth solid surfaces, the three-dimentional graphical method was proposed based on nonlinear Della Volpe modification of the van Oss-Chaudhury-Good equation.