A polymer dispersed ferroelectric liquid crystal ~PDFLC! is a novel material combining propertiesof a polymer ~flexibility, elasticity! and ferroelectric liquid crystal ~low voltage, fast electro-opticalswitching!. Another interesting field of application of PDFLC is the detection of low intensityradiation using the pyroelectric response of the material. A PDFLC material containing aferroelectric liquid crystal ~FLC! with very high spontaneous polarization ~close to 200 nC/cm2 atroom temperature! was prepared to study its pyroelectric properties. The matrix was pure polymerpoly-butadiene-styrene which can be mixed with liquid crystals in volatile solvents. The pyroelectricresponse and the spontaneous polarization were measured over a wide temperature range of thesmectic C* phase and compared with the corresponding quantities of the pure FLC. Figures of meritof pyroelectric PDFLC films were estimated and compared with those known for conventionalferroelectrics.
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|Titolo:||Pyroelectric properties of polymer dispersed ferroelectric liquid crystals|
|Data di pubblicazione:||1998|
|Appare nelle tipologie:||1.1 Articolo in rivista|