期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 353, 期 41-43, 页码 3871-3878出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2007.04.035
关键词
Raman scattering; x-ray diffraction; glass transition; mechanical, stress relaxation; polymers and organics; calorimetry; enthalpy relaxation; glass transition; fragility; structural relaxation; viscoelasticity; viscosity
The classical approaches of the slow dynamics of liquid glass formers and glasses are recalled. Actually, it is well acknowledged that several features are common to glasses and glass forming liquids. For example, the quasi universal occurrence of secondary beta slow (or so-called Johari-Goldstein) relaxation and its correlation with the a relaxation process has to be included in any physical model. This ingredient is now introduced in the coupling model proposed by Ngai. However, recent experimental data, mainly dealing with physical aging, show that some aspects remain unsolved and many questions are still to be answered. (C) 2007 Elsevier B.V. All rights reserved.
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