Electrorheological fluid

Details Electrorheological fluid Electrorheological fluid

1994-11-09

1996-03-12

Skane, Christine

Compositions

Etching or brightening compositions

252 73, 252 77, 25229966, C09K 1944, C09K 300

Patent

active

054983630

ABSTRACT:
Disclosed is an electrorheological fluid which is a uniform mixture or solution consisting of a thermotropic polymeric liquid crystal compound such as poly(4'-cyano-4-biphenyloxyhexyl acrylate) and a thermotropic low-molecular liquid crystal compound such as 4-cyano-4'-pentyl biphenyl to serve as the solvent of the polymer in a specified molar ratio. The viscosity of the liquid composition is increased as the direct-current electric field applied thereto is increased while this electrorheological effect disappears when the temperature of the composition is increased to exceed a phase transition temperature which is specific to the respective combinations of the polymeric and low-molecular liquid crystal compounds.

REFERENCES:
patent: 4462924 (1984-07-01), Raynes
patent: 5332522 (1994-07-01), Chen et al.
patent: 5387370 (1995-02-01), Tomizawa et al.
Chemical Abstracts, AN 114:24927, "Thermotropic liquid crystalline polymers", Kosfromin et al, 1990.
Chemical Abstracts, AN 114:43982, "Emission properties of polymer liquid crystals with side-chain mesogenic cyanobiphenyls in solution", Kurihara et al, 1991.

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