Measurements of rotational viscosity of SmC* mixtures

Wiktor Piecek; Jolanta Rutkowska; Jerzy Kedzierski; Pawel Perkowski; Zbigniew Raszewski; Roman S. Dabrowski

doi:10.1117/12.299958

1 February 1998 Measurements of rotational viscosity of SmC* mixtures

Wiktor Piecek, Jolanta Rutkowska, Jerzy Kedzierski, Pawel Perkowski, Zbigniew Raszewski, Roman S. Dabrowski

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.299958
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The rotational viscosity γ_φ has been studied for SmC* phase of ferroelectric liquid crystal mixtures containing a different amount of the same chiral dopant. Goldstone mode rotational viscosity γ_φ has been determined by two different methods. The first one is an electrooptical method, the second is a dielectric method using samples with unperturbed helicoidal structure. This method is based on measurements of Goldstone mode dielectric strength and relaxation frequency supplemented with values of the spontaneous polarization, the tilt angle. The rotational viscosity has been presented as a function of chiral dopant concentration and as a function of temperature. Results have been discussed in context of the dynamics of the structure under electric field.

Citation Download Citation

Wiktor Piecek, Jolanta Rutkowska, Jerzy Kedzierski, Pawel Perkowski, Zbigniew Raszewski, and Roman S. Dabrowski "Measurements of rotational viscosity of SmC* mixtures", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299958

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