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J. Chem. Phys. 113, 4374 (2000); http://dx.doi.org/10.1063/1.1286884 (5 pages)

Analysis of “equation of state” for supercooled liquid

Marian Paluch1, Stella Hensel-Bielowka2, and Tatiana Psurek2

1Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021 Mainz, Germany
2Institute of Physics, Silesian University, ul. Universytecka 4, 40-007 Katowice, Poland

(Received 18 April 2000; accepted 19 May 2000)

The pressure and temperature dependent dielectric relaxation times are compared with the predictions of the model proposed by Avramov. Remarkable agreement is found in whole P and T plane. It was also pointed out that the tested model predicts no pressure effect on fragility and nonlinear character of pressure dependence of glass transition temperature. Our data provide also an assessment of the generalized Vogel–Fulcher–Tammann (VFT) law. However, it is inferred that the generalized VFT law is not able to accurately reproduce the surface described by experimental relaxation times. Additionally, isothermal data are analyzed by the pressure counterpart of the temperature VFT law. The isothermal data expressed in terms of the reduced relaxation time and reduced pressure form a master curve. © 2000 American Institute of Physics.

© 2000 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 64.10.+h

    General theory of equations of state and phase equilibria

  • 77.22.Gm

    Dielectric loss and relaxation

  • 64.70.P-

    Glass transitions of specific systems

  • 64.70.Q-

    Theory and modeling of the glass transition

ARTICLE DATA

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

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