Entropic Nature of the Debye Relaxation in Glass-Forming Monoalcohols
文献类型：期刊论文
| 作者 | Xu, Di; Feng, Shidong; Wang, Jun-Qiang; Wang, Li-Min; Richert, R. |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY LETTERS
 |
| 出版日期 | 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 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20647]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 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. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。