Experimental evidence against the existence of an ideal glass transition

Sindee L. Simon; Gregory B. McKenna

doi:10.1016/j.jnoncrysol.2008.11.027

Experimental evidence against the existence of an ideal glass transition

Sindee L. Simon, Gregory B. McKenna

Chemical Engineering

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20 Scopus citations

Abstract

The absolute liquid heat capacity of poly(α-methyl styrene) was determined at temperatures far below T_g and T_K in previous work by use of pentamer/polymer athermal mixtures. Here the data is compared to data compiled by Wunderlich and coworkers from 0 K to above T_g in order to obtain the absolute entropy for the polymer in its equilibrium state at temperatures as much as 180 K below the glass temperature or 130 K below the Kauzmann temperature. The results provide no evidence of a second-order transition or of a smeared transition in the entropy. In addition, we find no evidence that the entropy would become negative at a finite temperature.

Original language	English
Pages (from-to)	672-675
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	355
Issue number	10-12
DOIs	https://doi.org/10.1016/j.jnoncrysol.2008.11.027
State	Published - May 1 2009

Keywords

Calorimetry
Glass transition
Polymers and organics

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10.1016/j.jnoncrysol.2008.11.027

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title = "Experimental evidence against the existence of an ideal glass transition",

abstract = "The absolute liquid heat capacity of poly(α-methyl styrene) was determined at temperatures far below Tg and TK in previous work by use of pentamer/polymer athermal mixtures. Here the data is compared to data compiled by Wunderlich and coworkers from 0 K to above Tg in order to obtain the absolute entropy for the polymer in its equilibrium state at temperatures as much as 180 K below the glass temperature or 130 K below the Kauzmann temperature. The results provide no evidence of a second-order transition or of a smeared transition in the entropy. In addition, we find no evidence that the entropy would become negative at a finite temperature.",

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note = "Funding Information: The support of the National Science Foundation under Grants DMR 0606500 (SLS) and DMR 0804438 (GBM) is gratefully acknowledged.",

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AU - McKenna, Gregory B.

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N2 - The absolute liquid heat capacity of poly(α-methyl styrene) was determined at temperatures far below Tg and TK in previous work by use of pentamer/polymer athermal mixtures. Here the data is compared to data compiled by Wunderlich and coworkers from 0 K to above Tg in order to obtain the absolute entropy for the polymer in its equilibrium state at temperatures as much as 180 K below the glass temperature or 130 K below the Kauzmann temperature. The results provide no evidence of a second-order transition or of a smeared transition in the entropy. In addition, we find no evidence that the entropy would become negative at a finite temperature.

AB - The absolute liquid heat capacity of poly(α-methyl styrene) was determined at temperatures far below Tg and TK in previous work by use of pentamer/polymer athermal mixtures. Here the data is compared to data compiled by Wunderlich and coworkers from 0 K to above Tg in order to obtain the absolute entropy for the polymer in its equilibrium state at temperatures as much as 180 K below the glass temperature or 130 K below the Kauzmann temperature. The results provide no evidence of a second-order transition or of a smeared transition in the entropy. In addition, we find no evidence that the entropy would become negative at a finite temperature.

KW - Calorimetry

KW - Glass transition

KW - Polymers and organics

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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

IS - 10-12

ER -

Experimental evidence against the existence of an ideal glass transition

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Keywords

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