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Journal of Thermal Analysis and Calorimetry

, Volume 81, Issue 1, pp 125–129 | Cite as

Simultaneous volume and enthalpy relaxation

The effect of experimental conditions
  • M. Liška
  • M. Chromčíková
Article

Summary

The ratio between the relaxed enthalpy and volume (so-called aging modulus, Ka) was expressed in frame of the Tool-Narayanaswamy-Moynihan theory. The common case where various experimental arrangements are used for measuring these quantities was analyzed. It was found that relatively small differences between the conditions of enthalpy and volume relaxation experiments may cause a significant shift of observed Ka value. The sensitivity of Ka modulus to the difference between the enthalpy and volume relaxation conditions is significantly higher in the case of organic polymeric glasses in comparison with silicate and chalcogenide glasses. The reason for such grouping resides in higher values of glass transition temperature and lower values of activation enthalpy of inorganic glasses.

DSC glass relaxation aging modulus thermodilatometry 

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • M. Liška
    • 1
  • M. Chromčíková
    • 2
  1. 1.Vitrum Laugaricio (VILA) - Joint Glass Center of Institute of Inorganic Chemistry SAS, Alexander Dubček University of Trenčín, and RONA, j.s.c. Lednické Rovne,
  2. 2.Vitrum Laugaricio (VILA) - Joint Glass Center of Institute of Inorganic Chemistry SAS, Alexander Dubček University of Trenčín, and RONA, j.s.c. Lednické Rovne,

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