Predicting the Thermodynamic Ideal Glass Transition Temperature in Glass-Forming Liquids

• Main Authors: Qian Gao, Zengyun Jian
• Format: Article
• Language: English
• Published: MDPI AG 2020-05-01
• Series: Materials
• Subjects: glass transition temperature; fragility parameter; Kauzmann temperature; thermodynamic ideal glass transition temperature; glass-forming liquid
• Online Access: https://www.mdpi.com/1996-1944/13/9/2151

The Kauzmann temperature<i> T</i>_K is a lower limit of glass transition temperature, and is known as the ideal thermodynamic glass transition temperature. A supercooled liquid will condense into glass before <i>T</i>_K. Studying the ideal glass transition temperature is beneficial to understanding the essence of glass transition in glass-forming liquids. The Kauzmann temperature <i>T</i>_K values are predicted in 38 kinds of glass-forming liquids. In order to acquire the accurate predicted <i>T</i>_K by using a new deduced equation, we obtained the best fitting parameters of the deduced equation with the high coefficient of determination (<i>R</i>² = 0.966). In addition, the coefficients of two reported relations are replaced by the best fitting parameters to obtain the accurate predicted <i>T</i>_K, which makes the <i>R</i>² values increase from 0.685 and 0.861 to 0.970 and 0.969, respectively. Three relations with the best fitting parameters are applied to obtain the accurate predicted <i>T</i>_K values.