Collective and molecular relaxations in polymeric ferroelectric liquid crystals and experimental proof of piezoelectricity in chiral smectic C-elastomers

A. Schönfeld Max—Planck—Institut für Polymerforschung, Postfach 31 48, W-6500, Mainz, FRG

F. Kremer Max—Planck—Institut für Polymerforschung, Postfach 31 48, W-6500, Mainz, FRG

S. U. Vallerien Max—Planck—Institut für Polymerforschung, Postfach 31 48, W-6500, Mainz, FRG

H. Poths Institut für Organische Chemie der Universität Mainz, Becherweg, 18–20, W-6500, Mainz, FRG

R. Zentel Institut für Organische Chemie der Universität Mainz, Becherweg, 18–20, W-6500, Mainz, FRG; Institut fur Organische und Makromol, Chemie der Universitat, Universitatsstr. 1, W-4000, Dusseldorf, FRG

Abstract

Broadband dielectric spectroscopy (10⁻¹ Hz — 10⁹ Hz) was used to study the collective and molecular dynamics in polymeric side-chain FLC. In the frequency window under study collective (Goldstone-mode) and molecular (β-relaxation) relaxations are observed. By crosslinking combined main-chain side-group polymers an elastomeric FLC can be prepared which exhibits a Goldstone-mode as well. The piezoelectricity in these elastomeric materials is experimentally proven.

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Collective and molecular relaxations in polymeric ferroelectric liquid crystals and experimental proof of piezoelectricity in chiral smectic C-elastomers

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Collective and molecular relaxations in polymeric ferroelectric liquid crystals and experimental proof of piezoelectricity in chiral smectic C-elastomers

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