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The connection between the measured glass transition temperature and the time dependent order parameter description of the glass transition

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Summary

The time dependent order parameter concept of the glass transition is used in a description of the relaxation behaviour of the glassforming material. The connection between the macroscopic theory and the measured glass transition temperature has been determined. It has been found that in a case when the Prigogine-Defay ratio is greater than unity, different values of the relaxation functions of entropy and volume obtained by different experiments (e.g., isobaric dilatometry and isothermal compression) should be used in order to obtain the identical Tg. The Prigogine-Defay ratio is found to be a decreasing function of the observation time reaching values between unity in the limit of infinite time and a limit which corresponds to extremely short experiments.

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Authors and Affiliations

  1. Institute of Macromolecular Chemistry, Czechoslovak, Academy of Sciences, 16206, Prague 6, Czechoslovakia

    Ivan Havliček

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  1. Ivan Havliček
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Havliček, I. The connection between the measured glass transition temperature and the time dependent order parameter description of the glass transition. Polymer Bulletin 5, 597–601 (1981). https://doi.org/10.1007/BF00255298

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  • DOI: https://doi.org/10.1007/BF00255298

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