Side-chain cholesteric liquid crystalline elastomers derived from a mesogenic crosslinking agent: I. Synthesis and mesomorphic properties
Side-chain cholesteric liquid crystalline elastomers derived from a mesogenic crosslinking agent: I. Synthesis and mesomorphic properties
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DOI：
10.1016/j.eurpolymj.2006.07.007
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发表时间：
2006-10-01
影响因子：
6
通讯作者：
Wang, Bai
中科院分区：
文献类型：
--
作者：
Hu, Jian-She;Zhang, Bao-Yan;Wang, Bai
介绍了由胆甾型单体和介晶交联剂衍生的新型侧链胆甾型弹性体的合成。通过元素分析、FT-IR、H-1 NMR和C-13 NMR确认了所得单体的化学结构。通过差示扫描量热法（DSC）、热重分析（TGA）、偏光光学显微镜（POM）和X射线衍射（XRD）测量研究了介晶性质和热稳定性。 M-1显示胆甾相，M-2显示对映向列相和单向性近晶相。交联单元含量低于12 mol%的弹性体表现出可逆介晶相变、宽介晶相温度范围和高热稳定性。 (c) 2006 Elsevier Ltd. 保留所有权利。
The synthesis of new side-chain cholesteric elastomers derived from a cholesteric monomer and mesogenic crosslinking agent is presented. The chemical structures of the monomers obtained were confirmed by elemental analyses, FT-IR, H-1 NMR, and C-13 NMR. The mesomorphic properties and thermal stability were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), polarizing optical microscopy (POM), and X-ray diffraction (XRD) measurements. M-1 showed cholesteric phase, and M-2 displayed enantiotropic nematic phase and monotropic smectic phase. The elastomers containing less than 12 mol% of the crosslinking units revealed reversible mesomorphic phase transition, wide mesophase temperature ranges, and high thermal stability. (c) 2006 Elsevier Ltd. All rights reserved.