標題: Ferroelectric liquid crystalline polymers based on mesogens with halogen-containing terminal groups
作者: Sha, YA
Hsiue, GH
Chiu, CH
Jeng, RJ
Tai, HC
應用化學系
Department of Applied Chemistry
公開日期: 1-Jan-2003
摘要: A new series of halogen-containing side chain ferroelectric liquid crystal polymers was synthesized. Mesophases were characterized by differential scanning calorimetry, polarizing optical microscopy. X-ray diffraction and molecular simulation. The behaviour of the liquid crystalline phase was investigated with variation of chiral centres. spacer units and grafted ratios. It was found that the thermal stability and temperature range of the chiral smectic C phase decreased with increasing length of the oligo-oxyethylene spacer. and decreasing mesogenic group content. The bulky substituent attached to the chiral centre reduces molecular packing in smectic liquid crystal phases, which disturbs the orientation of the side chain liquid crystal polymer. Furthermore, the influence of molecular structure on electro-optical properties of FLCPs has been studied by broad band dielectric spectroscopy (from 0.1 to 1 x 10(6) Hz).
URI: http://dx.doi.org/10.1080/0267829021000043349
http://hdl.handle.net/11536/28271
ISSN: 0267-8292
DOI: 10.1080/0267829021000043349
期刊: LIQUID CRYSTALS
Volume: 30
Issue: 1
起始頁: 71
結束頁: 80
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