Share Email Print
cover

Proceedings Paper

Broadband dielectric spectroscopy on ferroelectric liquid crystalline polymers
Author(s): A. Schoenfeld; Friedrich Kremer; H. Poths; Rudolf Zentel
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The collective and molecular dynamics of ferroelectric liquid crystalline side group polysiloxanes has been investigated for use of broadband dielectric spectroscopy (10-2 Hz - 109 Hz). In the lower frequency range (< 106 Hz) two collective relaxations, Goldstone- and soft-mode, could be observed. They are assigned to the fluctuations of the phase and the amplitude of the helical superstructure, respectively. In the high frequency regime (106 Hz - 109 Hz) one dielectric relaxation, the (beta) - relaxation, is found. It is assigned to the hindered rotation (libration) of the mesogene around its long molecular axis. It shows an Arrhenius-like temperature dependence with no deviations at the phase transition SA/S*C. A dilution of the mesogenes causes a decrease of the collectivity but remains the local dynamics uninfluenced.

Paper Details

Date Published: 4 April 1994
PDF: 11 pages
Proc. SPIE 2175, Liquid Crystal Materials, Devices, and Applications III, (4 April 1994); doi: 10.1117/12.172128
Show Author Affiliations
A. Schoenfeld, Max-Planck-Institut fuer Polymerforschung (Germany)
Friedrich Kremer, Max-Planck-Institut fuer Polymerforschung (Germany)
H. Poths, Univ. Mainz (Germany)
Rudolf Zentel, Univ. Mainz (Germany)


Published in SPIE Proceedings Vol. 2175:
Liquid Crystal Materials, Devices, and Applications III
Ranganathan Shashidhar, Editor(s)

© SPIE. Terms of Use
Back to Top