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Glass transition Kauzmann paradox

Let us now turn to a discussion of the relation of the temperature dependence of the polymer melt s configurational entropy with its glass transition and address the famous paradox of the Kauzmann temperature of glass-forming systems.90 It had been found experimentally that the excess entropy of super-cooled liquids, compared with the crystalline state, seemed... [Pg.21]

Stillinger, E H., Supercooled liquids, glass transitions, and the Kauzmann paradox. J. Chem. Phys 88,7818(1988). [Pg.82]

Woodcock, L. V., Glass transition in the hard-sphere model and Kauzmann s paradox , Ann. NY Acad. Sci. [Pg.333]

The calculation of the partition function can be done by the standard Flory-Huggins lattice method. The lattice model predicts the existence of a true second-order transition at a temperature T2. This is shown schematically in Figure 13 for the entropy-pressure-temperature equation of state. As can be seen, the transition occurs at a critical value of the entropy (zero configurational entropy) and the Kauzmann paradox is resolved for thermodynamic reasons rather than kinetic ones, i.e. one is simply not permitted to extrapolate high temperature behavior through the glass transition. Rather, as the material is cooled, a break in the S-T (or V-T) curves occurs because of a second-order transition. [Pg.323]


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See also in sourсe #XX -- [ Pg.100 , Pg.110 ]




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