Preparation and phase behavior of side-chain cholesteric liquid-crystal line elastomers

被引：11

作者：

Hu, JS ^{[1
]}

Zhang, BY ^{[1
]}

Zhou, AJ ^{[1
]}

Dong, YL ^{[1
]}

Zhao, ZX ^{[1
]}

机构：

[1] Northeastern Univ, Ctr Mol Sci & Engn, Shenyang 110004, Peoples R China

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2005年 / 43卷 / 15期

关键词：

liquid-crystalline; elastomers; cholesteric phase; nematic phase; networks; phase behavior;

D O I：

10.1002/pola.20784

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 side-chain cholesteric elastomers derived from cholesteryl 4-(10-undecylen-1-yloxy)-4'-ethoxybenzoate and phenyl 4,4-bis(10-undecylen-1-yloxybenzoyloxy-p-ethoxybenzoate) was synthesized. The chemical structures of the monomers were confirmed by elemental analyses, Fourier transform infrared, and H-1 NMR and C-13 NMR spectra. The mesomorphic properties of elastomers were investigated with differential scanning calorimetry, thermogravimetric analysis, polarizing optical microscopy, and X-ray diffraction measurements. The influence of the content of the crosslinking unit on the phase behavior of the elastomers was examined. Monomer M-1 showed a cholesteric phase, and M-2 displayed smectic and nematic phases. The elastomers containing < 15 mol % of the crosslinking units revealed reversible mesomorphic phase transition, wide mesophase temperature ranges, and high thermal stability. (c) 2005 Wiley Periodicals, Inc.

引用

页码：3315 / 3323

页数：9

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