Dielectric Properties in Ferroelectric Optically Active Polyamides

A relationship between dielectric constant ε or dielectric loss tan δ and structure was studied for optically active polyamides. The samples of these polyamides exhibited a chiral smectic phase due to their asymmetric structures and strong hydrogen bonds. The dielectric parameters were significantly...

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Bibliographic Details
Published inJournal of macromolecular science. Physics Vol. 39; no. 3; pp. 349 - 358
Main Authors LIU, YINFENG, HUA, JIADONG, SANG, WENBIN
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 18.05.2000
Subjects
Dielectric constant
Dielectric loss
Dielectric properties
Optically active polymers
Polyamides
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Summary:A relationship between dielectric constant ε or dielectric loss tan δ and structure was studied for optically active polyamides. The samples of these polyamides exhibited a chiral smectic phase due to their asymmetric structures and strong hydrogen bonds. The dielectric parameters were significantly influenced by temperature, but were hardly affected by frequency in the high-frequency region. The hindered rotations of the mesogens, which affect the polarization, depended on the structures and the phase transitions.
ISSN:0022-2348
1525-609X
DOI:10.1081/MB-100100390