Debye-type dielectric relaxation in glass-forming 3-methylthio-1-hexanol.
Debye-type dielectric relaxation in glass-forming 3-methylthio-1-hexanol.
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DOI：
10.1063/1.4812743
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
Yanqin Gao;Dongyang Bi;Xin Li;Riping Liu;Yongjun Tian;Li-Min Wang
中科院分区：
文献类型：
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作者：
Yanqin Gao;Dongyang Bi;Xin Li;Riping Liu;Yongjun Tian;Li-Min Wang
The dielectric relaxation of a substituted monohydroxy alcohol, 3-methylthio-1-hexanol, is studied in the highly viscous regime near the glass transition. The Debye relaxation is detected in the dielectric spectra showing the slowest and strongest relaxation dynamics. The calorimetric and dielectric measurements of the liquid and the mixtures with a Debye liquid (2-ethyl-1-hexanol) and a non-Debye liquid (2-ethylhexylamine) reproduce the dynamic characters of the relaxations in monohydroxy alcohols. The Debye relaxation strength and time of 3-methylthio-1-hexanol do not change much compared with 2-ethyl-1-hexanol, while the structural relaxation strength shows a considerable enhancement accompanied by an increase in relaxation time, indicative of a reduction in the dynamic separation between the Debye and structural relaxations. The experimental results allow for the examination of the structural models proposed for the Debye relaxation.
