Synthesis and Characterization of A Chiral Liquid Crystalline Monomer, Crosslinking Agent and Elastomer

Qing-wei DOU; Yan CHEN; Shao-yong HUANG; Zhi-wei SONG; Jian-she HU

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Synthesis and Characterization of A Chiral Liquid Crystalline Monomer, Crosslinking Agent and Elastomer

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- Synthesis and Characterization of A Chiral Liquid Crystalline Monomer, Crosslinking Agent and Elastomer
- Polymer Bulletin Vol. 27, Issue 11, Pages: 90-94(2014)
- 作者机构：
  
  1.泰州市产品质量监督检验所，泰州　225300
  2.东北大学理学院，沈阳　110004
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014-11，
  
  Received：13 January 2014，
  
  Revised：08 July 2014，
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Qing-wei DOU, Yan CHEN, Shao-yong HUANG, Zhi-wei SONG, Jian-she HU. Synthesis and Characterization of A Chiral Liquid Crystalline Monomer, Crosslinking Agent and Elastomer. [J]. Polymer Bulletin 27(11):90-94(2014)
DOI：

Qing-wei DOU, Yan CHEN, Shao-yong HUANG, Zhi-wei SONG, Jian-she HU. Synthesis and Characterization of A Chiral Liquid Crystalline Monomer, Crosslinking Agent and Elastomer. [J]. Polymer Bulletin 27(11):90-94(2014) DOI：

摘要

胡}建设报道了一种含薄荷基的手性单体(M

)、液晶交联剂(C

)及胆甾弹性体（LCE)

采用FT-IR与

H-NMR等手段表征了它们的化学结构，液晶的热性能与光学织构采用DSC、TGA、POM等仪器进行测试研究。结果表明：单体M

呈现手性近晶C相的破碎扇形织构及胆甾相的油丝织构和焦锥织构，交联剂C

在升降温过程中均呈现典型的近晶A相的扇形织构和向列相的线状织构，而弹性体LCE呈现胆甾相的Grandjean彩色织构，为互变热致液晶聚合物，此外，轻度的化学交联并没有显著影响弹性体的液晶性质，其对应的玻璃化温度和清亮点分别是10.5℃和176.2℃。TGA表明液晶弹性体具有良好的热稳定性，热分解温度为339℃。

Abstract

The synthesis of a chiral liquid crystalline monomer (M

) derived from menthol

crosslinking agent (C

) and cholesteric elastomer (LCE) is reported. Their chemical structures were characterized with FT-IR and

H NMR. The liquid crystalline properties and thermal stability were investigated by differential scanning calorimetry (DSC)

polarizing optical microscopy (POM)

and thermogravimetric analysis (TGA). The monomer M

exhibited enantiotropic broken fan- shaped of a chiral smectic C (S

) phase

and oily streak texture and focal conic texture of cholesteric phase on heating and cooling cycles. The crosslinking agent C

showed fan-shaped texture of a smectic A (S

) phase and thread texture of nematic phase. The elastomer LCEshowed cholesteric Grandjean texture because of the introduction of the nematic crosslinking unit. This indicated that lightly crosslinked elastomer showed the basic features of polymeric networks with anisotropic physical properties with reversible phase transition during heating and subsequent cooling. The glass transition temperature and clearing temperature of LCEwere 10. 5 and 176. 2℃

respectively. TGA showed that LCEhad a good stability

and the temperature at which 5% weight loss occurred was 339℃.

关键词

手性液晶单体交联剂弹性体

Keywords

ChiralLiquid crystallineMonomerCrosslinking agentElastomer

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