Enthalpy and dielectric relaxations in supercooled methyl m-toluate
Enthalpy and dielectric relaxations in supercooled methyl m-toluate
复制标题
过冷间甲苯甲酸甲酯的焓和介电弛豫
DOI：
10.1063/1.3142142
复制
发表时间：
2009-05-28
影响因子：
4.4
通讯作者：
Wang, Li-Min
中科院分区：
文献类型：
--
作者：
Chen, Zeming;Zhao, Yue;Wang, Li-Min
The structural relaxation of a glass forming liquid, methyl m-toluate, is studied in the deeply supercooled region near glass transition with the calorimetric and dielectric techniques. The thermodynamics and kinetics of the enthalpy relaxation are focused, and the kinetic studies are paralleled with dielectric relaxation. Relaxation enthalpies are expressed in two manners, and the numerical determination is based on the quantity of heat involved in the enthalpy recoveries from the relaxed glasses to liquids through glass transition. The correlations between the relaxation enthalpies and fragility are examined, and the remarkable dependence is visible for both cases. The enthalpy and dielectric relaxations in the liquid reveal comparable results of the fragility indices and stretching exponents.
