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Modulated differential scanning calorimetry in the glass transition region

II. The mathematical treatment of the kinetics of the glass transition

Journal of Thermal Analysis and Calorimetry
Authors: B. Wunderlich, A. Boller, I. Okazaki, and S. Kreitmeier

Temperature-modulated differential scanning calorimetry (TMDSC) is based on heat flow and represents a linear system for the measurement of heat capacity. As long as the measurements are carried out close to steady state and only a negligible temperature gradient exists within the sample, quantitative data can be gathered as a function of modulation frequency. Applied to the glass transition, such measurements permit the determination the kinetic parameters of the material. Based on either the hole theory of liquids or irreversible thermodynamics, the necessary equations are derived to describe the apparent heat capacity as a function of frequency.

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.0980 63.42 0.1347 The hole-theory was developed for molten salts but has been shown to be very useful for ionic liquids. It is shown that the value of E η

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basis of the hole theory of liquids and it has been found that the materials having large, Δ C p m /Δ S m exhibit large δ and low R c and such materials can form glasses more readily. It is further found that the material exhibiting large δ

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Authors: Zhong-Yi Wang, Gang Li, Chun-Ya Li, and Ang Li

8 Construction method 9 Structural holes theory 10 SNS

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's ( 1992 ) ‘structural holestheory (Morrison and Rabelotti 2009 ). That is, egos filling in structural holes are significantly more important at information diffusion. Later studies have started to apply the same framework for very knowledge intensive

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