標題: Synthesis and characterization of ferroelectric side chain liquid crystal polymers bearing banana-shaped chiral mesogens
作者: Wu, LH
Chu, CS
Janarthanan, N
Hsu, CS
應用化學系
Department of Applied Chemistry
關鍵字: banana-shape;ferroelectricity;smectic blue phase
公開日期: 1-六月-2000
摘要: A series of ferroelectric liquid crystal polymers having banana-shaped side chain mesogens were synthesized through photo-polymerization of epoxide moiety. 2,5-disubstituted-thiophene sub-unit was used in synthesizing the banana-shaped monomers. These liquid crystal compounds were characterized by NMR, differential scanning calorimetry (DSC) and optical polarized microscopy (POM). Mesomorphism was investigated as a function of spacer units. All the synthesized low molar mass banana-shaped compounds exhibit smectic blue phase, but chiral smectic C phase could be observed only on compounds having longer spacer. The clearing temperature of low molar mass compounds fluctuated a little when spacer length varies. All polymers exhibit cholesteric mesophase and an observable glass transition. These liquid crystalline compounds reveal strong photoluminescence at visible region (lambda(max) = 475 nm for M9EPX) and have potential use in polarized organic light emitting diode materials.
URI: http://hdl.handle.net/11536/30472
ISSN: 1022-9760
期刊: JOURNAL OF POLYMER RESEARCH-TAIWAN
Volume: 7
Issue: 2
起始頁: 125
結束頁: 134
顯示於類別:期刊論文


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