Study of the dielectric properties of ferroelectric liquid crystals and related side chain liquid crystalline polymers

Hsiue, Ging-Ho ; Lee, Kuang-Rong ; Chen, J.-Hong

Weinheim : Wiley-Blackwell
Published 1995
ISSN:
1022-1352
Keywords:
Chemistry ; Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Physics
Notes:
Broadband dielectric spectroscopy (frequency range 10-1-106 Hz) was used to analyze the frequency and temperature dependence of the molecular dynamics of a series of ferroelectric liquid crystals (FLCs) and polymers which exhibit a chiral smectic C (SC*) phase in a wide temperature range (about 190°C) including room temperature. Two ferroelectric modes, Goldstone and Soft mode, were observed in the low-molar-mass FLCs. Both of these modes were found in the SC* phase; however, only the soft mode was present in the smectic A (SA) phase. On the other hand, two collective relaxation processes (Soft and Goldstone mode) and four molecular relaxations (δ, α, β and γ-relaxation) of the side chain liquid crystalline polymer were demonstrated.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL: