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The Gibbs free energy difference between a supercooled melt and the crystalline phase of polymers

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Abstract

The temperature dependence of Gibbs free energy difference between the supercooled liquid and the crystalline phase, ΔG c, plays a fundamental role for the description of crystallization processes especially at high supercooling as occurring with many technical processes. In the literature, many different approximations for ΔG c(T) can be found. A test of these models with polymer data from the ATHAS database shows that none of them can be used as a general model. We present a new model for ΔG c(T) of polymers, which was successfully tested on ten different polymers. The result indicates that our approach might be generally valid for all polymers in the temperature range between the equilibrium melting temperature and the glass transition temperature.

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  1. Mettler-Toledo AG, Sonnenbergstrasse 74, 8603, Schwerzenbach, Switzerland

    Jürgen E. K. Schawe

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Schawe, J.E.K. The Gibbs free energy difference between a supercooled melt and the crystalline phase of polymers. J Therm Anal Calorim 120, 1417–1425 (2015). https://doi.org/10.1007/s10973-015-4453-z

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