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Resolution of conflicting views on thermodynamics of glass transition: A unified model

Jacob, KT and Prabhudev, Sagar and Mallya, RM (2010) Resolution of conflicting views on thermodynamics of glass transition: A unified model. In: Bulletin of Materials Science, 33 (5). pp. 603-609.

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Classical description of thermodynamic properties during glass transition has been questioned by the entropy-loss model. The uncompensated loss of entropy at the glass transition temperature and zero residual entropy is at the heart of the controversy. Both the models are critically reviewed. A unified model is presented which incorporates features of both entropy loss and residual entropy. It implies two different types of contributions to the entropy of the supercooled liquid, one of which vanishes at the transition and the other which contributes to residual entropy. Entropy gain during spontaneous relaxation of glass, and the nature of heat capacity `hysteresis' during cooling and heating through the glass transition range support the proposed model. Experiments are outlined for differentiating between the models.

Item Type: Journal Article
Publication: Bulletin of Materials Science
Publisher: Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Glass transition; thermodynamics; classical view; entropy-loss; residual entropy; unified model
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 07 Mar 2011 08:21
Last Modified: 07 Mar 2011 08:21
URI: http://eprints.iisc.ac.in/id/eprint/35907

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