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Dynamical properties of ethylene glycol and glucose studied by temperature-modulated differential scanning calorimetry and Brillouin scattering

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Abstract

The fragility of ethylene glycol and glucose aqueous solution systems has been investigated by temperature-modulated differential scanning calorimetry (TMDSC). The frequency and temperature dependences of complex specific heat have been observed in the vicinity of a glass-transition temperature T g . It is shown that the value of the fragility index m can be determined from the temperature dependence of the α-relaxation times observed by TMDSC. We have also studied the elastic properties of these aqueous solutions by micro-Brillouin scattering, and determined these relaxation times of elastic properties in the gigahertz range.

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Acknowledgements

This research was partially supported by the Ministry of Education, Science, Sports and Culture, Grants-in-Aid for Exploratory Research, 19656005, 2008 and the Research Foundation of the Japan Society for the Promotion of Science for Young Scientists, 18-3811, 2008.

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Correspondence to Seiji Kojima.

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Hashimoto, E., Seshimo, Y., Sasanuma, K. et al. Dynamical properties of ethylene glycol and glucose studied by temperature-modulated differential scanning calorimetry and Brillouin scattering. J Therm Anal Calorim 99, 45–50 (2010). https://doi.org/10.1007/s10973-009-0543-0

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