Phase Transition and Glass Transitions in Isocyanocyclohexane Studied by a Polaro-Calorimeter.
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概要
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Calorimetric and electric measurements have been performed simultaneously on Isocyanocyclohexane by using a polaro-calorimeter, which is essentially an adiabatic calorimeter with built-in electrodes in the sample cell. A phase transition between plastically crystalline and ordered low-temperature crystalline phases was found at 192.6 K. The corresponding enthalpy and entropy changes were determined to be 6.177kJ mol-1 and 32.07J K-1mol-1, respectively. Glassy crystal was formed by supercooling the plastically crystalline state. It underwent three glass transitions at 55K, 130K and 160K. Results of the simultaneous measurement of relaxation of the enthalpy and electric polarization were adequately described by an empirical Kohlrausch-Williams-Watts function.
- 日本学士院の論文
著者
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Kishimoto Isao
Department Of Chemistry Graduate School Of Science Osaka University
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Suga Hiroshi
Department Of Chemistry Faculty Of Science Osaka University
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Pinvidic Jean-jacques
Department Of Chemistry Graduate School Of Science Osaka University
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MATSUO Takasuke
Department of Chemistry and Microcalorimetry Research Center, Faculty of Science, Osaka University
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KISHIMOTO Isao
Department of Chemistry and Microcalorimetry Research Center, Faculty of Science, Osaka University
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Matsuo Takasuke
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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Suga Hiroshi
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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PINVIDIC Jean-Jacques
Department of Chemistry and Microcalorimetry Research Center, Faculty of Science, Osaka University
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