Angell plot

However, in this case the change of the definition of the steepness index may be not important since for the typical range of experimental data the condition Tgp >Tg is well fulfilled. Corrected definitions of steepness indexes are a clear consequence of corrected VFT-t5q)c equations for r(r), r(/ ), t(f) and t p) dependences. The Angell plot, logjo vs. TgjT, is probably the most... 

Fig 1.8 An Angell plot of the dependences of the viscosities of a series of liquids on their reduced temperature T/Tg, defining strong (Arrhenian) and fragile (VFT) liquids (from Busch (2000) courtesy of TMS). 

Fig. 1.10 Example of an Angell plot for typical glasses. Line a represents a strong glass former (m = 25), b represents a medium glass former (m = 50), and c represents a weak glass former...

Fig. 33. Plot of viscosities of various glass-forming materials against T/Tg (Angell plot). Inset shows jump in heat capacity Cp at Tg, which is generally large for fhe fragile liquids and small for strong liquids. (Reprinted with permission from [ 146]. Copyright 1995 American Association for the Advancement of Science)...

Figure 1.6 Angell plot showing the dependence of viscosity on temperature for many molecular systems near the glass transition. The continuous and dashed lines are guides for the eye. Reproduced with permission from Ref. 110, Nature, 2001, 410, 663-667. Doi 10.1038/35070517. Copyright ( 2001, Nature Publishing Group.

Figure 13 A modified Angell plot of the rescaled fragility displaying the dependence of the structural relaxation times to the scaling quantity r = f I/" for some typical van der Waals liquids and polymers. From Floudas, G. Paluch, M. Grzybowski, A. Ngai, K.L. Molecular Dynamics of Glass-Forming Systems Effects of Pressure Springer Heidelberg, 2011. ...

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