| Summary: | 碩士 === 國立清華大學 === 化學工程研究所 === 84 === In the research, the polymer dispersed liquid crystal (PDLC)
film was prepared and studied. Formulations used were a mixture
of epoxy oligomer, acrylate oligomer and E63 liquid crystal.
The UV/thermal stepwise curing procedure were used to produce
PDLC film, and the electrooptical characteristics of film were
discussed in different formulations ,including three different
stochiometric ratios of epoxy oligomer/hardener, three
different weights of liquid crystal. Then the film was
subjected to various ambient temperatures to observe electro-
optic changes. The UV and thermal curing condition s were
determined by the studies of DSC, TGA, respectively, The phase
separation degrees of liquid crystal droplets in PDLC film were
discussed by DSC and the sizes of droplets were observed by
SEM. Finally, the spectrophotometer was used to measure the
transmittance of PDLC film in the presence of applied electric
field in various temperatures. These suggest that a PDLC film
can be used as a voltage and temperature sensing material.
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