Glass transition: Difference between revisions
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In the laboratory the '''glass transition''' is not a sharp transition; its properties change smoothly across <math>T_g</math>. | |||
*<math>T_g</math> ''increases'' with a decrease in the observation time, <math>\tau_{\rm obs}</math>. | |||
*<math>\Delta H =0</math> | |||
*<math>\Delta V =0</math> | |||
==Ideal glass transition temperature== | ==Ideal glass transition temperature== | ||
See Ref 1. | See Ref 1. | ||
==Observation time== | |||
<math>\tau_{\rm obs}</math> | |||
==Intrinsic average structural relaxation time== | |||
==See also== | ==See also== | ||
*[[Kauzmann's paradox]] | *[[Kauzmann's paradox]] | ||
Revision as of 15:16, 19 June 2007
In the laboratory the glass transition is not a sharp transition; its properties change smoothly across .
- increases with a decrease in the observation time, .
Ideal glass transition temperature
See Ref 1.
Observation time
Intrinsic average structural relaxation time
See also
References
- C. A. Angell and J. C. Tucker "Heat capacities and fusion entropies of the tetrahydrates of calcium nitrate, cadmium nitrate, and magnesium acetate. Concordance of calorimetric and relaxational ideal glass transition temperatures", Journal of Physical Chemistry 78 pp. 278 - 281 (1974)
- Prabhat K. Gupta and John C. Mauro "The laboratory glass transition", Journal of Chemical Physics 126 224504 (2007)