| Summary: | 碩士 === 輔仁大學 === 化學系 === 84 === Liquid crystal 5-OCB(4'-Pentyloxy-4-biphenyl-carbonitrile)
exhibts a nematic phase in general,while smectic phases may be
induced when blended with some low molecular weight liquid
crystals,Four types of alkoxyphyl ester LC (4-Cyanophenyl-4-
butylbenzoate,G1 ;4-n-Butyl benzonic Acid 4-n-Hexyloxyphenyl
Ester,G2 ;4-n-Pentyl benzoic Acid 4'-n-butyloxyphenyl Ester,G3
;4-n-Pentylbenzoic Acid 4'-n-Octyloxyphenyl Ester,G4) were
chosen and DSC ,POM as well as DDA were employedto study the
behaviors of blended. Our study show that only G2,G3 and G4
blendedwith the ratio of 5:5,4:6,6:4, can generate smectic phase
.These result were explained based on the configurations of
liquid crystals.We use the nematic liquid crystal to blend
instead of smectic liquid crystal ,it is because of the low
viscosity of nematic liquid crystal,besides it isnot easy to
induce phase separation.
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