Thermodynamical Scaling of the Glass Transition Dynamics

Details Thermodynamical Scaling of the Glass Transition Dynamics Thermodynamical Scaling of the Glass Transition Dynamics

2004-03-24

arxiv.org/abs/cond-mat/0403622v1

Physics

Condensed Matter

Soft Condensed Matter

12 page, 4 figures

Scientific paper

10.1103/PhysRevE.69.062501

Classification of glass-forming liquids based on the dramatic change in their properties upon approach to the glassy state is appealing, since this is the most conspicuous and often-studied aspect of the glass transition. Herein, we show that a generalized scaling, log tau proportional to T^(-1)V^(-gamma), where gamma is a material-constant, yields superpositioning for ten glass-formers, encompassing van der Waals molecules, associated liquids, and polymers. The exponent gamma reflects the degree to which volume, rather than thermal energy, governs the temperature and pressure dependence of the relaxation times.

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