3A05 全フッ素置換鎖を有するポリカテナーメソゲン14PCFの相挙動と熱容量(2004年日本液晶学会討論会)

概要

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Heat capacity of the title compound was measured by adiabatic calorimetry on bulk sample below 400 K. The as-prepared crystal is metastable around its melting temperature to the cubic phase. The cubic phase is also metastable. There is the other, thermodynamically stable crystalline phase, which undergoes a phase transition below room temperature. The asprepared crystal shows below room temperature a trapezoidal anomaly in temperature dependence of heat capacity. The thermal effects are very small in the Col-SmA_d and SmA_d-IL phase transitions as previously observed through DSC experiments. An anomalous increase in heat capacity is observed a few K below the SmA_d - IL phase transition, around which the layer spacing was reported to start decreasing.
日本液晶学会の論文
2004-09-26