Prediction of the glass transition temperature of water solutions: Comparison of different models

  • Katkov I
  • Levine F
  • 1


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


The glass transition temperature (Tg) of a sample is an important parameter that determines its stability during storage. While T g can be measured by a variety of methods, it is a time-consuming procedure, especially if the sample is to be kept at subzero temperatures, in anhydrous conditions, or if sampling a portion of the specimen for analysis is cumbersome. Hence, predicting rather than directly measuring Tg as a function of the content of the constituents of a blend, mixture, or solution can be a powerful tool. Two main models for predicting Tg have been proposed: Couchman-Karasz (C-K) and Gordon-Taylor (G-T) formalisms. However, many aspects of both are theoretical/terminological in nature, and substantial controversy exists about the various experimental approaches to measuring T g as well. Here, we compare C-K and G-T formalisms, as well as related problems that arise from the variety of definitions and methods of measuring Tg. Water-trehalose solutions are used as an example for application of the analysis. However, the same conclusions can be expanded to any other solutions so thermodynamical parameters (Tg, ΔC p, and k) of 20 other commonly used solutes are provided. Practical pitfalls related to determining water content, including experimental data on thermal gravimetry, are also discussed. © 2004 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • [Carbohydrates, Couchman-Karasz, Drying, Glass tra

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • I.I. Katkov

  • F. Levine

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free