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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kanke, Yasuhiro Nagoe, Atsushi Oguni, Masaharu |
| Description | Country affiliation: Japan Author Affiliation: Nagoe A ( Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan.) |
| Abstract | Glass transition behaviors of dilute aqueous solutions are currently unclear because the water crystallizes immediately below the fusion temperatures to prevent the determination. The behaviors of methanol aqueous solutions [(CH(3)OH)(x)(H(2)O)(1 - x)] were studied here by confining the solutions within silica-gel pores and following the enthalpy relaxation associated with the glass transitions by adiabatic calorimetry. The dilution of the solutions in the composition range x < 0.3 brought both abrupt increase in the glass transition temperature T(g) as referred to the composition dependence expected from the behavior in x > 0.3 and appearance of a new glass transition at around 115 K. It was conjectured from the results that a hydrogen-bond network inherent to water starts to develop at around x = 0.3, and that molecules on the pore wall cannot join the network by forming tetrahedrally extended hydrogen-bonds so that they should constitute a mobile layer as an interfacial one. Such a special layer is understood as absent above x > 0.3, indicating that no network structure inherent to water is developed in the solutions. |
| ISSN | 09538984 |
| e-ISSN | 1361648X |
| Journal | Journal of Physics: Condensed Matter |
| Issue Number | 36 |
| Volume Number | 22 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2010-09-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Condensed Matter Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Materials Science |
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