Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
60 (1992), S. 3238-3240
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have studied the electro-optic properties as a function of temperature of a polymer dispersed liquid crystal film composed of E7 dispersed as droplets in a polyvinylformal (PVFM) matrix. The drive voltage and turn-off time change abruptly as the temperature is raised above the glass transition temperature (Tg) of the PVFM matrix. There is essentially no hysteresis below, but significant hysteresis above Tg. These temperature effects are completely reversible. The rapid change in electro-optic properties cannot be entirely explained by changes in the polymer dielectric properties or droplet shape. Freedericksz measurements show no abrupt change in the surface anchoring energy at Tg, which may be responsible for the changes observed in the electro-optic response.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.106705
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