Journal
JOURNAL OF APPLIED PHYSICS
Volume 114, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4856295
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- BOE Technology Group
- Air Force through Azimuth Co.
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We developed a phenomenological theory to describe the aligning field of polymer networks in polymer stabilized liquid crystals where sub-micron size polymer networks are phase separated from the liquid crystal in dispersion. The polymer networks are anisotropic and anchor the liquid crystals in their longitudinal direction. They inhibit the liquid crystals reorientation when external stimuli, such as electric field and temperature, are applied and reduce the relaxation time from distorted states. We model the effects produced by the polymer networks as an effective aligning field. We calculate the effective field as a function of the polymer network volume fraction and the lateral size of the network. The theory is compared with experimental results and good agreements were obtained. It is very useful in predicting how much polymer networks change the driving voltage and response time of liquid crystal devices. (C) 2013 AIP Publishing LLC.
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