Sorption and Thermodynamic Characteristics of Compositions of Water-Soluble Nonionic Polymers and Nanocluster Polyoxomolybdates

New data on the interaction between methanol vapors and compositions based on polyvinylpyrrolidone and polyvinyl alcohol that include nanocluster polyoxomolybdates of the keplerate and toroidal types are obtained using the gravimetric option of equilibrated interval sorption and the results from calculations of the thermodynamic cycle. Adsorption isotherms, concentration dependences of the Gibbs energy of the interaction between methanol and polymer films, and the Gibbs energy and entropy for polyoxometallate–polymer systems are obtained. The data are analyzed from the viewpoint of the effect the nature of components has on the properties of the compositions.