Myuller's Structural Models in Statistical Thermodynamics of Glasses1

The impact of Myuller's chemical–structural method on the development of the modern concepts concerning the structure and physicochemical properties of glasses is considered. Making allowance for the switching of homo- and heterobonds, it is demonstrated that this method permits one to investigate the ranges of variations in glass parameters (adaptivity) and to estimate the energy accumulated during structural transformations. The partition function and the main thermodynamic functions of glasses are calculated by choosing a set of structural states that can be realized in glasses. It is proved that the adaptivity leads to multivaluedness of thermodynamic functions even for a particular glass composition.