6533b7d3fe1ef96bd1261205
RESEARCH PRODUCT
Molecular dynamics in low-molar and polymeric ferroelectric liquid crystals
Friedrich KremerRudolf ZentelHeinrich KapitzaS. U. Valleriensubject
Range (particle radiation)Materials sciencePolymers and PlasticsOrganic ChemistryMolecular axisCondensed Matter PhysicsRotationFerroelectricityMolecular physicsMolecular dynamicsNuclear magnetic resonanceLiquid crystalvisual_artMaterials Chemistryvisual_art.visual_art_mediumGoldstoneBroadband dielectric spectroscopydescription
Broadband dielectric spectroscopy covering the frequency range from 10−1 Hz to 109 Hz was employed to study the molecular dynamics in low-molar and polymeric ferrroelectric liquid crystals. At frequencies below 106 Hz the ferroelectric modes, soft and Goldstone mode are observed. In the frequency regime from 106 Hz to 109 Hz a fast relaxation process is found, which is assigned to the hindered rotation of the mesogens around their long molecular axis. It turns out that the molecular dynamics is not principally different between low-molar and polymeric systems.
year | journal | country | edition | language |
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1991-05-01 | Makromolekulare Chemie. Macromolecular Symposia |