EVALUATION OF THE IDEAL GLASS TRANSITION TEMPERATURE AND OTHER THERMODYNAMIC PROPERTIES OF GLASS FORMING LIQUIDS.

Abstract

An earlier hole theoretical model of the liquid state developed by the authors is modified to reduce the number of parameters required to describe the thermodynamic properties. It has been shown that good agreement can be achieved between observed and calculated Gibb's free energy change accompanying freezing at large undercooling for a variety of substances. Estimates of the Kauzmann glass transition temperatures of these substances also agree well with those extrapolated from relaxation and thermodynamic data. The present analysis simplifies the procedures for obtaining the viscous behavior and time-temperature transformation diagrams for glass forming substances.