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Updated: Aug 30, 2025

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Impact of dynamic stretching exponent on the correlation between liquid fragility and nonexponentiality at the glass
1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, PA 16802, United States of America.
Abstract:
The presence of large scatter in linear response data has cast doubt on the existence of an inverse correlation between liquid fragility and nonexponentiality, as originally proposed by Böhmeret al(1993J. Chem. Phys.994201). We present a model for the temperature dependence of the stretching exponent based on the Mauro-Yue-Ellison-Gupta-Allan model for supercooled liquid viscosity and discuss the factors impacting the relationship between fragility and the stretching exponent at the glass transition. The proposed model exhibits distinct advantages over previous models in terms of interpretability and limit behaviors for the temperature dependence.
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