Going strong or falling apart?
Article Abstract:
Water becomes a strong liquid near 136K, its glass-transition temperature at atmospheric pressure. Research in this area has compared kinetic and thermodynamic measures of a liquid's fragility. These measures were found to be consistent for all liquids investigated, apart from water. There is growing evidence from computer simulations that the apparent divergences in the dynamic properties of supercooled water can be regarded as realizations of behaviour forecast by mode-coupling theory. It has not yet been possible to produce a satisfactory theoretical justification of the Adams-Gibbs relationship, which links the relaxation times of liquids to their entropy.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Thermodynamic determination of fragility in liquids and a fragile-to-strong liquid transition in water
Article Abstract:
Water which has been obtained in the glassy state by very rapid cooling gives a kinetically 'strong' liquid above its Tg, the glass transition temperature. According to the thermodynamic method, water is the most fragile of all liquids studied in recent research near its melting point. In contrast, the kinetic approach indicates that near the glass transition water is the least fragile. It is clear that the difference in character of water above 236 K and below 150 K is real and extreme.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
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