Effective medium theory of polymer dispersed liquid crystal droplet systems II: partially ordered bipolar droplets
Effective medium theory of polymer dispersed liquid crystal droplet systems II: partially ordered bipolar droplets
We construct a theory of the dielectric properties of a polymer dispersed liquid crystal droplet film containing bipolar droplets whose principal axes respond to an electric field. The theory involves a balance of an elastic energy term favouring an initial zero-field distribution of droplet axes and a dielectric energy term favouring droplet orientation parallel to an imposed field. We discuss (i) droplets initially orientationally ordered by an in-plane strain field and (ii) an initially random distribution of droplets. In case (i) we find a weakly droplet concentration dependent sharp threshold field at which droplet reorientation occurs. In case (ii) we find more gradual droplet reorientation. In the latter case the droplet axis distribution exhibits an unexpectedly rich structure.
3253-3266
Yu Reshetnyak,, V.
5138fc96-f4ac-4a32-a8b9-39e870e66f64
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
1997
Yu Reshetnyak,, V.
5138fc96-f4ac-4a32-a8b9-39e870e66f64
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
Yu Reshetnyak,, V., Sluckin, T.J. and Cox, S.J.
(1997)
Effective medium theory of polymer dispersed liquid crystal droplet systems II: partially ordered bipolar droplets.
Journal of Physics D: Applied Physics, 30 (23), .
(doi:10.1088/0022-3727/30/23/009).
Abstract
We construct a theory of the dielectric properties of a polymer dispersed liquid crystal droplet film containing bipolar droplets whose principal axes respond to an electric field. The theory involves a balance of an elastic energy term favouring an initial zero-field distribution of droplet axes and a dielectric energy term favouring droplet orientation parallel to an imposed field. We discuss (i) droplets initially orientationally ordered by an in-plane strain field and (ii) an initially random distribution of droplets. In case (i) we find a weakly droplet concentration dependent sharp threshold field at which droplet reorientation occurs. In case (ii) we find more gradual droplet reorientation. In the latter case the droplet axis distribution exhibits an unexpectedly rich structure.
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Published date: 1997
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Local EPrints ID: 29565
URI: http://eprints.soton.ac.uk/id/eprint/29565
ISSN: 0022-3727
PURE UUID: 43bb97cf-19d0-4472-97d3-0235b92ae894
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Date deposited: 14 Mar 2007
Last modified: 16 Mar 2024 02:32
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Author:
V. Yu Reshetnyak,
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