Relaxation dynamics in glycerol-water mixtures. 2. Mesoscopic feature in water rich mixtures |
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Authors: | Hayashi Yoshihito Puzenko Alexander Balin Igal Ryabov Yaroslav E Feldman Yuri |
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Institution: | Department of Applied Physics, The Hebrew University of Jerusalem, Givat Ram, 91904, Jerusalem, Israel. |
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Abstract: | The relaxation dynamics of water-rich glycerol-water mixtures is studied by broadband dielectric spectroscopy (BDS) at 173-323 K and differential scanning calorimetry (DSC) at 138-313 K. These data indicate the existence of the critical concentration of 40 mol % glycerol. In the studied temperature range for water-rich glycerol mixtures, the two states of water (ice and interfacial water) are observed in addition to water in the mesoscopic 40 mol % glycerol-water domains. The possible kinetics of water exchange between different water states is discussed in order to explain the mechanism of the broad melting behavior observed by DSC. |
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