Abstract
The physical ageing characteristics of glucose, fructose, and their mixtures were studied using standard differential scanning calorimetry (DSC). The inflection, onset, midpoint,half-height, and endpoint glass transition temperature (T g), fictive temperature (T f), and relaxation enthalpy (ΔH) were measured as a function of ageing time. The relationship between ΔH and T f was evaluated. The time dependence of ΔH was fit using the Cowie and Ferguson model. The ageing rate was expressed in terms of the average relaxation time (<τ>) and the entropy production (P). It was found that the fructose component decreased the rate of ageing of the mixtures.
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Wungtanagorn, R., Schmidt, S.J. Thermodynamic Properties and Kinetics of the Physical Ageing of Amorphous Glucose, Fructose, and Their Mixture. Journal of Thermal Analysis and Calorimetry 65, 9–35 (2001). https://doi.org/10.1023/A:1011574031179
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DOI: https://doi.org/10.1023/A:1011574031179