Heat capacities and phase transitions of crystalline 1,3,5-trichloro-2,4,6-trimethylbenzene.
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概要
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Heat capacities were measured of 1,3,5-trichloro-2,4,6-trimethylbenzene by adiabatic calorimetry from 3 to 327 K covering the three stable solid phases, II, III, and IV. The phase transitions, III–II and IV–III, are of first order and accompanied by a hysteresis effect. The IV–III transition occurs at 163.5 K when the crystal cooled slowly from Phase II, whereas the heat capacity anomaly splits into two at 158.7 and 163.5 K if the crystal was cooled rapidly. From the time dependence of Raman spectra at low frequencies, kinetics of transition II–III was studied; it is best explained by diffusionless nucleation mechanism. The thermal hysteresis can be rationalized by assuming the existence of a metastable phase IV′.
- 公益社団法人 日本化学会の論文
著者
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Atake Tooru
Research Laboratory Of Engineering Materials Tokyo Institute Of Tachnology
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Fujiwara Takahiro
Department Of Chemistry Faculty Of Science Osaka University
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Chihara Hideaki
Department Of Chemistr Faculty Of Science Osaka University
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Fujiwara Takahiro
Department of Chemistry and Microcalorimetry Research Center, Faculty of Science, Osaka University
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