Determination of rotational viscosity of nematic liquid crystals from transient current : numerical analysis and experiment

A simple method is presented for the determination of the rotational viscosity of nematic liquid crystals. Theoretical expressions for the rotational viscosity from transient displacement current in nematic liquid crystals are derived. The validity of the expressions is numerically examined. It is f...

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Veröffentlicht in:	JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 1994, Vol.33 (6A), p.3482-3487
Hauptverfasser:	IMAI, M, NAITO, H, OKUDA, M, SUGIMURA, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Diffusive momentum transport (including viscosity of liquids) Exact sciences and technology Physics Transport properties of condensed matter (nonelectronic) Viscosity of liquids diffusive momentum transport
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Beschreibung
Zusammenfassung:	A simple method is presented for the determination of the rotational viscosity of nematic liquid crystals. Theoretical expressions for the rotational viscosity from transient displacement current in nematic liquid crystals are derived. The validity of the expressions is numerically examined. It is found that the rotational viscosity can be obtained with sufficient accuracy. The rotational viscosity of ZLI-2293 (Merck Ltd.) is measured at various temperatures by the present method.
ISSN:	0021-4922 1347-4065
DOI:	10.1143/jjap.33.3482