Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid : N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures
Joint Authors
Hatano, Naohiro
Imai, Yusuke
Yoshimura, Yukihiro
Hanasaki, Tomonori
Abe, Hiroshi
Shimada, Osamu
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-11-14
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
By a simple differential thermal analysis (DTA) system, the concentration dependence of the glass transition temperatures (Tgs) for the quaternary ammonium-type ionic liquid, N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bromide [DEME][Br] and H2O mixtures, after quick precooling was measured as a function of water concentration x (mol% H2O).
We compared the results with the previous results of [DEME][I]-H2O and [DEME][BF4]-H2O mixtures in which a double-glass transition behavior was observed.
Remarkably, the [DEME][Br]-H2O mixtures basically show one-Tg behavior and the Tg decreases monotonically with increasing H2O content up to around x=91.5.
But it suddenly jumps to higher Tg value at a specific x=~92.
At this very limited point, two Tgs (Tg1,Tg2) which we might consider as a transition state from the structure belonging to the Tg1 group to another one due to the Tg2 group were observed.
These results clearly reflect the difference in the anionic effects among Br−, I−, and BF4-.
The end of the glass-formation region of [DEME][Br]-H2O mixtures is around x=98.9 and moves to more water-rich region as compared to those of [DEME][BF4]-H2O (x=96.0) and [DEME][I]-H2O (x=95.0) mixtures.
American Psychological Association (APA)
Yoshimura, Yukihiro& Hatano, Naohiro& Imai, Yusuke& Abe, Hiroshi& Shimada, Osamu& Hanasaki, Tomonori. 2011. Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid : N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures. Journal of Thermodynamics،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-482055
Modern Language Association (MLA)
Yoshimura, Yukihiro…[et al.]. Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid : N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures. Journal of Thermodynamics No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-482055
American Medical Association (AMA)
Yoshimura, Yukihiro& Hatano, Naohiro& Imai, Yusuke& Abe, Hiroshi& Shimada, Osamu& Hanasaki, Tomonori. Glass Transition Behavior of the Quaternary Ammonium-Type Ionic Liquid : N,N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium Bromide-H2O Mixtures. Journal of Thermodynamics. 2011. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-482055
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-482055