Synthesis and characterization of side-chain cholesteric liquid-crystalline polymers derived from steroid substituents

被引：7
|
作者：
Hu, JS [1 ]
Zhang, BY [1 ]
Pan, W [1 ]
Li, YH [1 ]
Ren, SC [1 ]
机构：
[1] Northeastern Univ, Ctr Mol Sci & Engn, Shenyang, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2006年 / 99卷 / 05期
关键词：
liquid-crystalline polymers; synthesis; cholesteric phase; steroid groups;
D O I：
10.1002/app.22700
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A series of new cholesteric liquid-crystalline polysiloxanes derived from steroid substituents were synthesized. The chemical structures of the monomers or polymers obtained were characterized by FTIR, element analyses, H-1 NMR, and C-13 NMR. Their mesogenic properties and thermal stability were investigated by differential scanning calorimetry, thermogravimetric analysis, polarizing optical microscopy, and X-ray diffraction measurements. Monomers exhibited typical cholesteric focal-conic or spiral texture. The polymers P-1-P-6 showed cholesteric phase and P, displayed smectic phase. (c) 2005 Wiley Periodicals, Inc. J Appl Polyrn Sci 99: 2330-2336, 2006
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页码：2330 / 2336
页数：7
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