High-resolution calorimetry on thermal behavior of glycerol (I): Glass transition, crystallization and melting, and discovery of a solid-solid transition

作者：Sou Kalyan; Nishikawa Keiko; Koga Yoshikata; Tozaki Ken ichi^*

来源：Chemical Physics Letters, 2011, 506(4-6): 217-220.

DOI：10.1016/j.cplett.2011.03.043

We determined temperature scanning thermograms of glycerol, with the same scanning rate for cooling and warming cycles by using an ultra-sensitive calorimeter at the scanning rate beta from 0.05 to 4 mK/s. Four peaks were observed during the warming process starting from below the glass transition temperature T'(g); glass transition, crystallization, solid-solid phase transition, and melting. T'(g) and the crystallization temperature T(p) depends on beta with Arrhenius relation. A broad melting behavior was obtained in a temperature range larger than 10 K, which suggests that structural distribution exists in the crystal. The solid-solid phase transition at 229.1 K was discovered.

• 出版日期2011-4-20