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Proceedings Paper

Polar nematic liquid crystal formed from aromatic polyesters with head-tail character
Author(s): Masao Koike; Liu Yuqing; Hitoshi Tsuchiya; Tatsuya Imase; Masatoshi Tokita; Susumu Kawauchi; Hideo Takezoe; Junji Watanabe
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Paper Abstract

We describe a distinct polar nematic liquid crystal formed from the polar rod-like aromatic polyester which comprises 4-hydroxybenzoaic acid (HBA) and 6-hydroxy-2naphthoic acid (HNA) in a molar ratio of 73/27. The nemtic liquid crystal is biaxial and the polarity appears along both axes as determined by measurements of the second harmonic generation. The polar structure disappeasrs when the molecular weight in polyester is decreased, showing that the large dipole moment of each chain is responsible for the polar ordering. The strong dipole-dipole interaction between polar rod-like molecules may be ascribed to the origin of the polarility.

Paper Details

Date Published: 15 October 2004
PDF: 11 pages
Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); doi: 10.1117/12.563058
Show Author Affiliations
Masao Koike, Tokyo Institute of Technology (Japan)
Liu Yuqing, Tokyo Institute of Technology (Japan)
Hitoshi Tsuchiya, Tokyo Institute of Technology (Japan)
Tatsuya Imase, Tokyo Institute of Technology (Japan)
Masatoshi Tokita, Tokyo Institute of Technology (Japan)
Susumu Kawauchi, Tokyo Institute of Technology (Japan)
Hideo Takezoe, Tokyo Institute of Technology (Japan)
Junji Watanabe, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 5518:
Liquid Crystals VIII
Iam-Choon Khoo, Editor(s)

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