Über den Zustand der unterkühlten Flüssigkeiten und Gläser

Thermodynamics of Silicate Melts: Configurational Properties

“…We will not specifically address these aspects, however, because they have already been extensively discussed in the geochemical literature from a relaxational (Dingwell and Webb, 1990) or thermochemical standpoint Bottinga, 1983, 1986). In this review, we will focus on features of liquids that are directly related to atomic mobility, namely, the existence of those contributions to physical properties of liquids that have been termed configurational (Simon, 1931;Bernal, 1936).…”

Macroscopic non-equilibrium thermodynamics in dynamic calorimetry

“…To the best of our knowledge, the notion of non-equilibrium thermodynamic state due to the freezing of internal degree of freedom (the chemical equilibrium being not reached) during the glass transition was first due to Simon [67,68]. For a good representation of the configurational heat capacity, let us paraphrase Bernal in the reference [69] [72], and Prigogine and Defay [59,62].…”

The Use of Matlab in the Study of the Glass Transition and Vitrification in Polymers

“…A further important characteristic of the glassy state is that it is a non-equilibrium state. This was first recognized by Simon (Simon, 1931) the best part of a century ago, who proposed that, on cooling the equilibrium liquid at constant pressure, a transformation to a glass takes place at a temperature, known as the glass transition temperature, T g , when the timescale for molecular rearrangements, which increases as the temperature decreases, becomes longer than that available corresponding to the imposed cooling rate. An immediate consequence of this is that the glass transition is a kinetic phenomenon, and that T g depends on the cooling rate.…”