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Some anomalous rheological responses of thermotropic liquid crystals

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Summary

The rheological properties of smectic, nematic and cholesteric thermotropic liquid crystals have been investigated with the Rheometrics Mechanical Spectrometer. Steady flow, relaxation after cessation of steady flow, sinusoidal deformation and step strain modes have been employed. Highly non-linear responses for the smectic systems have been observed which can possibly lead to new areas of applications some of which are briefly discussed.

Zusammenfassung

Die rheologischen Eigenschaften von smektischen, nematischen und cholesterischen thermotropen flüssigen Kristallen wurden mit dem Mechanischen Spektrometer der Fa. Rheometrics untersucht, wobei die Betriebsweisen der stationären Strömung, der Relaxation nach Anhalten der stationären Strömung, der sinusförmigen Deformation und der stufenweisen Dehnung angewendet wurden. Bei den smektischen Systemen wird ein hochgradig nicht-lineares Verhalten beobachtet, das möglicherweise auf neue Anwendungsbereiche hinweist. Einige derselben werden kurz diskutiert.

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Authors and Affiliations

  1. Instituttet for Kemiindustri, The Technical University of Denmark, DK-2800, Lyngby, Denmark

    L. L. Chapoy

  2. Doctors Health Facilities, 9440 Poppy Drive, 75218, Dallas, Texas, USA

    R. W. Duke

Authors
  1. L. L. Chapoy
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  2. R. W. Duke
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With 8 figures and 2 tables

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Chapoy, L.L., Duke, R.W. Some anomalous rheological responses of thermotropic liquid crystals. Rheol Acta 18, 537–544 (1979). https://doi.org/10.1007/BF01736958

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  • DOI: https://doi.org/10.1007/BF01736958

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