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Dynamics and structure of hydrogen-bonding glass formers : Comparison between hexanetriol and sugar alcohols based on dielectric relaxation
| Title: | Dynamics and structure of hydrogen-bonding glass formers : Comparison between hexanetriol and sugar alcohols based on dielectric relaxation |
| Authors: | Nakanishi, Masahiro1 Browse this author | | Nozaki, Ryusuke2 Browse this author |
| Authors(alt): | 中西, 真大1 | | 野嵜, 龍介2 |
| Issue Date: | Apr-2010 |
| Publisher: | American Physical Society |
| Journal Title: | Physical review E |
| Volume: | 81 |
| Issue: | 4 |
| Start Page: | 041501 |
| Publisher DOI: | 10.1103/PhysRevE.81.041501 |
| PMID: | 20481725 |
| Abstract: | Broadband dielectric spectra of supercooled 1,2,6-hexanetriol are presented in order to reveal physical picture behind a glass transition of polyhydric alcohols. It has been reported so far that temperature dependences of α relaxation time for sugar alcohols exhibit systematic trend against number of carbon atoms or OH groups per molecule. However, because each molecule is composed of equal number of carbon atoms and OH groups in the case of the reported sugar alcohols, the more dominant parameter to govern the α relaxation dynamics has not been discussed. By using a chemical structure of the hexanetriol composed of the deferent number of carbon and OH, it is possible to determine the dominant parameter. From temperature dependence of α relaxation times, it is strongly supported that the number of OH groups is the dominant parameter. Furthermore, from an analysis of static dielectric constant, it is suggested that local hydrogen-bonding structure is similar among all polyhydric alcohols. From these two results, a simple picture of the origin of the systematic character is proposed. |
| Rights: | ©2010 The American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/43061 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 野嵜 龍介
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