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Open AccessArticle

Entropy of Mixing and the Glass Transition of Amorphous Mixtures

Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, USA
Entropy 2008, 10(3), 207-223; https://doi.org/10.3390/entropy-e10030207
Received: 24 June 2008 / Revised: 20 August 2008 / Accepted: 20 August 2008 / Published: 26 August 2008
(This article belongs to the Special Issue Configurational Entropy)
Different equations have been proposed for estimating the glass transition temperature of amorphous mixtures. All such expressions lack a term to account for the effect of the entropy of mixing on the glass transition. An entropy based analysis for the glass transition of amorphous mixtures is presented. The treatment yields an explicit mixing term in the expression for the glass transition temperature of a mixture. The obtained expression reduces to the Couchman-Karasz equation in the limiting case where the contribution of the entropy of mixing approaches zero. Equivalent expressions are obtained for the glass transition temperature of a mixture of two glass formers as for the effect of a plasticizing liquid diluent on the glass transition temperature of an amorphous material. View Full-Text
Keywords: entropy of mixing; amorphous mixtures; configurational entropy; liquid mixtures; glass transition; plasticizer; glassy mixtures entropy of mixing; amorphous mixtures; configurational entropy; liquid mixtures; glass transition; plasticizer; glassy mixtures
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Pinal, R. Entropy of Mixing and the Glass Transition of Amorphous Mixtures. Entropy 2008, 10, 207-223.

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