Rao, KJ and Kumar, Sundeep and Bhat, MH (2001) A chemical approach to understand fragilities of glass-forming liquids. In: Journal of Physical Chemistry B, 105 (38). pp. 9023-9027.
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Fragility is viewed as a measure of the loss of rigidity of a glass structure above its glass transition temperature. It is attributed to the weakness of directional bonding and to the presence of a high density of low-energy configurational states. An a priori fragility function of electronegativities and bond distances is proposed which quite remarkably reproduces the entire range of reported fragilities and demonstrates that the fragility of a melt is indeed encrypted in the chemistry of the parent material. It has also been shown that the use of fragility-modified activation barriers in the Arrhenius function account for the whole gamut of viscosity behavior of liquids. It is shown that fragility can be a universal scaling parameter to collapse all viscosity curves on to a master plot.
|Item Type:||Editorials/Short Communications|
|Additional Information:||Copyright of this article belongs to American Chemical Society.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||02 Aug 2011 09:44|
|Last Modified:||02 Aug 2011 09:44|
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