Dynamical scaling analysis using the Lillie Number for vitrification of deeply supercooled glycerol |
| |
| Authors: | Kalyan Sou Keiko Nishikawa Yoshikata Koga Ken-ichi Tozaki |
| |
| Affiliation: | 1. Department of Physics, Graduate School of Science, Chiba University, Chiba 263-8522, Japan;2. Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan;3. Department of Chemistry, The University of British Columbia, Vancouver, BC Canada V6T 1Z1;4. Faculty of Education, Chiba University, Chiba 263-8522, Japan |
| |
| Abstract: | Thermal response was measured for a deeply supercooled glycerol specimen by applying calorimetric temperature scanning rate spectroscopy, cooling the specimen from liquid at a slow constant cooling rate until glass transition was observed. The effective fraction of glass as a function of temperature was determined and a new definition of glass transition temperature, TgC, as the temperature at which the effective glass fraction to be 0.5 was presented. The relation between this and the cooling rate showed the Arrhenius behavior. The effective glass fraction curves shifted linearly as a function of ln(cooling rate). When T was scaled to the Lillie Number, the glass fraction lay on a master curve, which was successfully fitted with a Kohlrausch–Williams–Watts function. The Kohlrausch exponent, the relaxation time as a function of temperature and the kinetic fragility index were determined. The results were compared with literature values. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
