Synthesis and Characterization of All-Aromatic Thermotropic Liquid Crystalline Polymer/Glass Fiber In-Situ Composites

ZHANG Chuan-ji; HUANG Zhi-xiong; SHI Min-xian

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Synthesis and Characterization of All-Aromatic Thermotropic Liquid Crystalline Polymer/Glass Fiber In-Situ Composites

Material Physics & Chemistry | 更新时间：2020-08-12

- Synthesis and Characterization of All-Aromatic Thermotropic Liquid Crystalline Polymer/Glass Fiber In-Situ Composites
- Chinese Journal of Liquid Crystals and Displays Vol. 25, Issue 3, Pages: 311-315(2010)
- 作者机构：
  
  武汉理工大学材料科学与工程学院,湖北武汉,430070
- 作者简介：
- 基金信息：
- DOI：
  CLC： O753+.2
- Received：25 October 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 June 2010，
  
  Published：30 June 2010
- 稿件说明：
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张传吉;黄志雄;石敏先. 全芳热致性液晶高分子/玻纤原位复合材料的合成与表征[J]. 液晶与显示, 2010,25(3): 311-315

ZHANG Chuan-ji;HUANG Zhi-xiong;SHI Min-xian. Synthesis and Characterization of All-Aromatic Thermotropic Liquid Crystalline Polymer/Glass Fiber In-Situ Composites[J]. 液晶与显示, 2010,25(3): 311-315
张传吉;黄志雄;石敏先. 全芳热致性液晶高分子/玻纤原位复合材料的合成与表征[J]. 液晶与显示, 2010,25(3): 311-315 DOI：

ZHANG Chuan-ji;HUANG Zhi-xiong;SHI Min-xian. Synthesis and Characterization of All-Aromatic Thermotropic Liquid Crystalline Polymer/Glass Fiber In-Situ Composites[J]. 液晶与显示, 2010,25(3): 311-315 DOI：

摘要

以对羟基苯甲酸(HBA)、4

4'-联苯二酚(HB)、1

3-二溴丙烷(DP)、对苯二甲酸(TA)为共聚物单体

玻纤为增强共聚组分

采用原位熔融缩聚的方法

一步混合直接投料聚合出全芳香族液晶共聚酯/玻纤原位复合材料。用核磁共振(

H NMR)、差热分析(DSC)、偏光显微镜(POM)、扫描电镜(SEM)等测试分析手段对复合材料的结构、热性能和液晶特性进行了表征。研究结果表明

合成所得的复合材料呈现明显的向列性热致液晶的特性

取代基的引入降低了复合材料的熔点

而取代基链长直接影响复合材料的熔点。玻纤的加入增强了复合材料的强度

在TLCP的基体中

玻纤拥有良好的取向性

同时TLCP也有自纤化现象的产生。

Abstract

Melt poly-condensation reaction has been applied for the synthesis of a new all-aromaitc thermotropic liquid crystalline polymer derived from 4-acetoxybenzoic

4＇-diacetoxybiphenyl

3-dibromobutane and terephthalic acid. All the obtained composites were chara-cterized by conventional spectroscopic methods. Their liquid crystalline behaviors and thermal properties of the all-aromatic polyesters were characterized with polarized optical microscopy(POM)

thermogravimetric analysis

and differential scanning calorimetry(DSC).An obvious birefringence phenomenon with nematic texture was found. The wholly rigidity backbone aromatic series ester has a high glass transition

when substituent is leaded-in

the glass transition will reduce obviously.The mechanical properties of TLCP/GF had been improved greatly as the content of glass fiber was increased.Thats because glass fiber formed oriented structures and TLCP also show a self-fibrosis phenomenon.

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references

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