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Updated: May 17, 2025

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Influence of the microstructure on the glass transition of amorphous materials
M Salah1, M Hamoudi2, J F Willart1
1Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France.
Abstract:
In this paper, we study in details the glass transition of amorphous trehalose obtained by three fundamentally different amorphization techniques: milling, freeze-drying and melt quenching. The results reveal extremely different apparent Cp jumps at the glass transition depending on the technique used. A detailed analysis of these Cp jump signatures by MDSC indicates that these differences are more related to the specific microstructures of the amorphous materials than to their structures. Understanding the effects of the microstructure of an amorphous material on its glass transition signature should help avoid misinterpreting some anomalous-appearing glass transitions and attributing wrong structural and energetic properties to the corresponding amorphous materials.
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