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Advances in the generalized entropy theory of glass-formation in polymer melts

Published

Author(s)

Jack F. Douglas, J Dudowicz, Karl Freed

Abstract

The generalized entropy theory (GET) of polymeric glass-forming liquids is reformulated in a simpler and more natural formalism than our previous version of this theory. This new theory is then applied to survey essential trends in the dependence of the segmental relaxation time, fragility, characteristic temperatures of glass-formation, etc., on monomer molecular structure, chain rigidity, and cohesive interaction strength, aspects of the dynamics and thermodynamics of glass-forming liquids that are not emphasized in our previous work. Special attention is placed on the parameters of the Vogel-Fulcher-Tammann (VFT) relation describing relaxation in diverse glass-forming liquids in the low temperature range of glass formation,Tg > T > Tc (or Tg
Citation
Journal of Chemical Physics

Keywords

generalized entropy theory of glass formation, polymers, fragility, molecular structure, segmental relaxation time, Adam-Gibbs theory

Citation

Douglas, J. , Dudowicz, J. and Freed, K. (2014), Advances in the generalized entropy theory of glass-formation in polymer melts, Journal of Chemical Physics (Accessed February 21, 2024)
Created December 21, 2014, Updated January 27, 2020