期刊
CHEMICAL PHYSICS LETTERS
卷 556, 期 -, 页码 117-121出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2012.11.072
关键词
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资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0010497]
- National Research Foundation of Korea
- Korean Government [2012R1A1B3001357]
- National Research Foundation of Korea [2010-0010497, 2012R1A1B3001357] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Relaxation phenomena and acoustic properties of acetaminophen in the glassy and supercooled liquid phase were studied by dielectric, photon correlation and Brillouin spectroscopies. Dielectric and photon correlation studies revealed the structural relaxation process while a new relaxation process was found by dielectric measurement in a much lower frequency range. The acoustic anomalies clearly indicated a glass transition at 293 K and some remnant localized motions in the glassy phase that contributed to the acoustic damping. Partial crystallization in the supercooled liquid phase was signified at temperatures above 318 K by drastic changes in the Brillouin spectrum and decrease in the dielectric strength. (C) 2012 Elsevier B. V. All rights reserved.
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