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Dielectric relaxation of PMMA as function of pressure, temperature and frequency

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Summary

It is shown that the influence of pressure on dielectric relaxation in polymers is easily predicted from the apparent energy of activation and the specific volume, if the energy of activation is known as function of the free (or excess) volume at atmospheric pressure. This is demonstrated for Polyvinylchloride (PVC) and for three types of dielectric relaxation in polymethyl-methacrylate (PMMA).

Zusammenfassung

Es wird gezeigt, daß sich der Einfluß des Drucks auf dielektrische Relaxation in Polymeren leicht aus der scheinbaren Aktivierungsenergie und dem spezifischen Volumen ermitteln läßt, wenn die Aktivierungsenergie als Funktion des freien Volumens bei Normaldruck bekannt ist. Dies wird am Beispiel der α-Relaxation in Polyvinylchlorid (PVC) und an drei Relaxationstypen in Polymethylmethacrylat (PMMA) demonstriert.

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Author notes

  1. P. Heydemann

    Present address: IIIrd Institute of Physics, University, Göttingen

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    1. P. Heydemann
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    Additional information

    The author wishes to thank Prof. Dr. Dr.- Ing. E. h.E. Meyer for his steady interest in this study. The investigation was carried out as part of one item of a research contract with the Department of Physical Research, Admiralty, London.

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    Heydemann, P. Dielectric relaxation of PMMA as function of pressure, temperature and frequency. Kolloid-Z.u.Z.Polymere 195, 122–128 (1964). https://doi.org/10.1007/BF01503659

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    • DOI: https://doi.org/10.1007/BF01503659

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