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Updated: May 20, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films

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Published on: January 26, 2016

Affinity and its derivatives in the glass transition process.

J-L Garden¹, H Guillou, J Richard

¹Institut Néel, CNRS et UJF, 25 Avenue des Martyrs, 38042 Grenoble Cedex 09, France. jean-luc.garden@grenoble.cnrs.fr

The Journal of Chemical Physics

|July 19, 2012

Summary

The lattice-hole theory, combined with non-equilibrium thermodynamics and pressure, offers new insights into the glass transition. This approach clarifies vitrification and structural recovery, providing a pedagogical tool for understanding the underlying thermodynamics.

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Area of Science:

Thermodynamics
Materials Science
Physical Chemistry

Background:

The thermodynamic treatment of the glass transition is a complex and debated topic.
Previous studies have utilized non-equilibrium thermodynamics and lattice-hole theory to explore this phenomenon.
Existing models have not fully accounted for the influence of pressure on structural degrees of freedom.

Purpose of the Study:

To provide new insights into the thermodynamic treatment of the glass transition.
To incorporate pressure as a variable to account for the freezing-in of structural degrees of freedom.
To demonstrate the importance of previously neglected terms in the affinity-driving force.

Main Methods:

Employing a thermodynamic approach based on the lattice-hole theory of liquids.
Including pressure as an additional variable in the theoretical framework.
Utilizing macroscopic non-equilibrium thermodynamics to derive coefficients like C(p), κ(T), and α(p).

Main Results:

Identified and incorporated crucial, previously neglected terms related to the derivatives of the affinity-driving force.
Calculated thermodynamic coefficients as a function of pressure and temperature.
Revealed classical aspects of vitrification and structural recovery processes.

Conclusions:

A minimalist model, such as the lattice-hole theory, rigorously applied with macroscopic non-equilibrium thermodynamics, can explain key features of glass transition phenomenology.
The inclusion of pressure is vital for accurately describing the freezing-in of structural degrees of freedom.
This approach serves as a valuable pedagogical tool for understanding the thermodynamics of the glass transition.