Study of the dielectric properties of ferroelectric liquid crystals and related side chain liquid crystalline polymers
ISSN: |
1022-1352
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Keywords: |
Chemistry ; Polymer and Materials Science
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Source: |
Wiley InterScience Backfile Collection 1832-2000
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Topics: |
Chemistry and Pharmacology
Physics
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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.
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Additional Material: |
10 Ill.
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Type of Medium: |
Electronic Resource
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URL: |