Entropy and relaxation time

This paper discusses the possible relation between entropy and the relaxation time of liquids, in particular glass-forming systems, providing supplementing comments to the paper entitled “A brief critique of the Adam-Gibbs entropy model” by Hecksher et al. [J. Non-Cryst. Solids 325, 624-627 (2009)]. Besides the Adam-Gibbs model, we also briefly discuss Rosenfeld’s excess entropy scaling and the 1964 experimental observation by Chang and Bestul of a universal excess entropy at the glass transition.