Adams-Gibbs model

Adam-Gibbs Model for the Supercooled Dynamics in the Ortho-Terphenyl Ortho-Phenylphenol Mixture. 

While the combination of the LCT for polymer glasses and the postulates of the Adam-Gibbs model for relaxation in cooled liquids captures many aspects of... 

To proceed further, we make use of the Adam-Gibbs model for the temperature dependence of relaxation time x(T) of cooperative rearranging regions in glassforming liquids [41]... 

From the Adam-Gibbs model, rnmm can be written as... 

In contrast, the barrier for cooperative rearrangements in the Adam-Gibbs model is inversely proportional to configurational entropy density [41]... 

One way to improve the Adam-Gibbs model is to include details of the structure of the interface between the various aperiodic minima [39]. Near the Kauzmann temperature, the interface broadens, and correct scaling laws are obtained by wetting the droplet surface [39]. In this case, the surface tension of the entropic droplet is a function of its radius and can be obtained by renormalization group arguments. Analysis reveals that the activation barrier to configuration rearrangement is [39]... 

Arrhenius plots demonstrating the effect of temperature on lettuce seed aging rate (squares) and on molecular mobility calculated using the Adam-Gibbs model and heat capacity measurements (open circles) and from rotational motion using electron spin resonance measurements. Data are from Walters et al., (2004) (aging rate), Walters, (2004) (glass relaxation rates) and Buitink et al., (2000) (ESR measurements). 

Hierarchical surfaces may also provide a realisation of the Adam-Gibbs model [178,179], which assumes that relaxation is due to cooperatively rearranging regions whose size increases with decreasing temperature. On a hierarchical landscape, structural change involves longer pathways with higher barriers as the temperature decreases. 

Cp° is the conhgurational heat capacity, i.e. the difference in Cp between the liquid (glass) and crystal states, and T2 is the temperature at which the conhgurational entropy reaches zero, T k- A modihed Adam-Gibbs model describes non-equilibrium relaxation in the glassy state. A hctive temperature is introduced, which represents the... 

Sconf = According to the Adam-Gibbs model the critical size of the cooperative... 

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