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On the minimum of Poisson's ratio in polymers

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Summary

The calculation ofPoisson's ratio from the complexYoung's modulus and the complex shear modulus of polyvinylchloride as function of the temperature through the entire glass transition leads to curves with comparatively deep minima. It is shown that the shape of thePoisson's ratio curve depends on the rate of temperature change during the measurements. No minima were found in direct measurements ofPoisson's ratio.

Zusammenfassung

Die Berechnung der Querkontraktionszahl aus den komplexen Schub- und Elastizitätsmoduln von Polyvinylchlorid als Funktion der Temperatur führt im Bereich des Hauptrelaxationsgebietes zu einer Kurve mit einem relativ tiefen Minimum. Es wird gezeigt, daß die Form dieser Kurve von der Temperaturänderungsgeschwindigkeit bei der Messung der Moduln abhängt. Bei einer direkten Messung der Querkontraktionszahl wurden keine Minima gefunden.

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References

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Additional information

The author wishes to thank Prof. Dr. Dr. E. h.E. Meyer for his great 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. On the minimum of Poisson's ratio in polymers. Kolloid-Z.u.Z.Polymere 193, 12–15 (1963). https://doi.org/10.1007/BF01500061

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  • DOI: https://doi.org/10.1007/BF01500061

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