Method for electric field orientation of liquid crystal polymers

Details Method for electric field orientation of liquid crystal polymers Method for electric field orientation of liquid crystal polymers

1988-06-03

1991-01-08

Stoll, Robert L.

Compositions

Liquid crystal compositions

428 1, 252582, 252587, C09K 1952, F21V 900, G02B 502

Patent

active

049833189

ABSTRACT:
This invention relates to a method for electric field orientation of liquid crystal polymers and oriented materials of liquid crystal polymers obtained by the method. This electric field orientation method comprises applying a pulsating electric field which is predominantly unidirectional and whose magnitude is varying periodically or non-periodically to a liquid crystal polymer capable of forming an optically anisotropic melt phase. The oriented material of liquid crystal polymer thus obtained has been unidirectionally oriented and polarized. This oriented, polarized material of liquid crystal polymer can be utilized as a piezoelectric material, pyroelectric material, electret material, non-linear optical element or the like.

REFERENCES:
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patent: 4694066 (1987-09-01), De Martino et al.
patent: 4779961 (1988-10-01), De Martino
patent: 4826950 (1989-05-01), De Martino
Meredith G. R. et al. Macromolecules 15, 1385, 1982.
Day, G. W. et al., Appl. Phys. Lett. 24, 456, 1974.
Die Makromolekulare Chemie Rapid Communications, vol. 2, p. 305 (1981).
Die Makromolekulare Chemie Rapid Communications, vol. 183, p. 1245 (1982).
Polymer Communications, vol. 24, p. 364 (1983).

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