室温显示胆甾相的侧链液晶聚合物的合成与表征

高利; 郭璐璐; 陈新诗; 杨淼; 田梅

doi:10.3788/YJYXS20203506.0524

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室温显示胆甾相的侧链液晶聚合物的合成与表征

材料与器件 | 更新时间：2020-07-13

- 室温显示胆甾相的侧链液晶聚合物的合成与表征
- Synthesis and characterization of side chain liquid crystalline polymers displaying cholesteric phase at room temperature
- 液晶与显示 2020年35卷第6期页码：524-530
- 作者机构：
  
  1.新乡医学院三全学院化学教研室, 河南新乡 453003
  2.广西壮族自治区环境保护科学研究院, 广西南宁 530000
  3.东北大学理学院, 辽宁沈阳 110004
- 作者简介：
  
  [ "高利(1989-), 女, 河南濮阳人, 硕士, 讲师, 2012年于东北大学获得硕士学位, 主要从事高分子新型材料的合成与性能测试研究。E-mail:798731079@qq.com" ]
  [ "田梅(1970-),女, 黑龙江镜泊湖人, 博士, 副教授, 2009年于东北大学获得博士学位, 主要从事功能液晶材料的研发工作. E-mail:tianmei613@sina.com." ]
- 基金信息：
  
  河南省高等学校重点科研项目(20B350007);校级教学改革研究重点项目(201508)
- DOI：10.3788/YJYXS20203506.0524
  中图分类号： O753.2
- 收稿日期：2019-09-12，
  
  修回日期：2019-11-07，
  
  录用日期：2019-11-7，
  
  纸质出版日期：2020-06-05
- 稿件说明：
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高利, 郭璐璐, 陈新诗, 等. 室温显示胆甾相的侧链液晶聚合物的合成与表征[J]. 液晶与显示, 2020,35(6):524-530.

Li GAO, Lu-lu GUO, Xin-shi CHEN, et al. Synthesis and characterization of side chain liquid crystalline polymers displaying cholesteric phase at room temperature[J]. Chinese journal of liquid crystals and displays, 2020, 35(6): 524-530.
高利, 郭璐璐, 陈新诗, 等. 室温显示胆甾相的侧链液晶聚合物的合成与表征[J]. 液晶与显示, 2020,35(6):524-530. DOI： 10.3788/YJYXS20203506.0524.

Li GAO, Lu-lu GUO, Xin-shi CHEN, et al. Synthesis and characterization of side chain liquid crystalline polymers displaying cholesteric phase at room temperature[J]. Chinese journal of liquid crystals and displays, 2020, 35(6): 524-530. DOI： 10.3788/YJYXS20203506.0524.

摘要

将聚甲基含氢硅氧烷（PMHS）与向列相柔性单体11-（4'-（4-乙氧基苯甲酸）苯）十一烯酸酯（M

）和胆甾相单体烯丙氧基苯甲酸胆甾醇酯（M

）接枝共聚合成了聚合物P

。利用红外光谱（FTIR）、氢谱（

H NMR）、差示扫描量热法（DSC）、偏光分析（POM）、X射线衍射分析（XRD）、热失重分析（TGA）、旋光分析等手段研究了单体和聚合物的结构和液晶性能。结果表明，除聚合物P

为向列型液晶聚合物外，P

为胆甾型液晶聚合物，即向列相柔性单体M

的引入并未改变胆甾相，而且与柔软的硅氧烷主链共同作用起到了降低玻璃化温度（P

、P

在室温即出现液晶态）、拓宽液晶区间、稳定液晶相、降低成本的作用，有利于液晶聚合物的应用。

Abstract

A series of liquid crystal (LC) polymers (P

) were synthesized by grafting with nematic flexible monomer 4-(undec-10-enoyloxy) phenyl 4-ethoxybenzoate (M

) and cholesteric monomer cholesteryl allyloxybenzoate (M

) to polymethyl hydrosiloxane (PMHS). The chemical structures and properties of the monomers and copolymers were investigated by means of fourier transform infrared spectroscopy (FTIR)

nuclear magnetic resonance hydrogen spectrometer (

HNMR)

differential scanning calorimetry (DSC)

polarised optical microscopy (POM)

X-ray diffraction (XRD)

thermogravimetric analysis (TGA) and polarimeter. The analyses show that P

are cholesteric LC polymers

except that P

is a nematic LC polymer. The introduction of nematic flexible monomer M

did not change the cholesteric phase. The introduction of M

together with the soft siloxane main chain play a role in reducing the glass transition temperature (P

and P

show LC state at room temperature)

widening the LC range

stabilizing the LC phase and reducing the cost

which is beneficial to the application of LC polymers.

关键词

Keywords

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