Main chain-type chiral smectic polymer liquid crystal and polyme

Details Main chain-type chiral smectic polymer liquid crystal and polyme Main chain-type chiral smectic polymer liquid crystal and polyme

1989-12-29

1993-11-02

Lovering, Richard D.

Compositions

Liquid crystal compositions

2522996, 25229966, 25229967, 359104, C09K 1952, C09K 1906, G02F 113

Patent

active

052581349

ABSTRACT:
A chiral smectic main chain-type polymer liquid crystal includes mesogen units and a flexible chain group connecting the mesogen units having a length equal to or longer than 1,4-butylene group. The polymer liquid crystal is also characterized by having at least two units having mutually different optically active groups and having at least two recurring units which show mutually reverse helical rotations in its chiral smectic phase. Because of these features, the polymer liquid crystal can show an improved responsiveness because of its chiral smectic ferroelectricity based on an elongated helical pitch while retaining a good film-formability of a main chain-type polymer liquid crystal.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4844835 (1989-07-01), Uchida et al.
patent: 4892675 (1990-01-01), Nohira et al.
patent: 4943387 (1990-07-01), Furukawa et al.
patent: 4965591 (1990-10-01), Kurabayashi et al.
Clark et al., App. Phys. Lett., vol. 36, No. 11, (1980), 899:901.
Shibaev et al., Polymer Comm., vol. 24, (1983), 364:5.

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