Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols

doi:10.1021/acs.jpclett.0c01499

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	Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols
	Xu, Di ; Feng, Shidong ; Wang, Jun-Qiang ; Wang, Li-Min ; Richert, R.
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2020
卷号	11 期号:14 页码:5792-5797
关键词	SUB-ROUSE MODES DIELECTRIC-RELAXATION TRANSITION LIQUIDS PRESSURE POLYMERS DYNAMICS RUBBER MOTION
DOI	10.1021/acs.jpclett.0c01499
英文摘要	The dynamics and thermodynamics of the Debye and structural (alpha) relaxations in isomeric monoalcohols near the glass transition temperature T-g are explored using dielectric and calorimetric techniques. The alpha relaxation strength at T-g is found to correlate with the heat capacity increment, but no thermal signals can be detected to link to the Debye relaxation. We also observed that the activation energy of the Debye relaxation in monoalcohols is quantitatively correlated with that of the alpha relaxation at the kinetic T-g, sharing the dynamic behavior of the Rouse modes found in polymers. The experimental results together with the analogy to the Rouse modes in polymers suggest that the Debye process in monoalcohols is an entropic process manifested by the total dipole fluctuation of the supramolecular structures, which is triggered and driven by the alpha relaxation.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20647]
专题	2020专题
作者单位	1.Wang, LM (corresponding author), Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China. 2.Wang, LM (corresponding author), Yanshan Univ, Coll Mat Sci & Engn, Qinhuangdao 066004, Hebei, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Di,Feng, Shidong,Wang, Jun-Qiang,et al. Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2020,11(14):5792-5797.
APA	Xu, Di,Feng, Shidong,Wang, Jun-Qiang,Wang, Li-Min,&Richert, R..(2020).Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,11(14),5792-5797.
MLA	Xu, Di,et al."Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 11.14(2020):5792-5797.