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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (8): 755-759. 上一篇    下一篇

研究论文

含X-型二维液晶基元和冠醚环的液晶共聚酯的研究

张淑媛1, 徐晓辉2, 王经武2, 杜洋2, 李晓威2, 王鹏飞1, 李自法*,2   

  1. (1郑州大学化学系 郑州 450052)
    (2郑州大学材料工程学院 郑州 450052)
  • 投稿日期:2006-07-04 修回日期:2006-11-20 发布日期:2007-04-28
  • 通讯作者: 李自法

Study of Liquid Crystalline Copolyesters with X-Shaped Two-dimensional Mesogenic Units and Crown Ether Cycle

ZHANG Shu-Yuan1; XU Xiao-Hui2; WANG Jing-Wu2; DU Yang2; LI Xiao-Wei2; WANG Peng-Fei1; LI Zi-Fa*,2   

  1. (1 Department of Chemistry, Zhengzhou University, Zhengzhou 450052)
    (2 College of Materials Engineering, Zhengzhou University, Zhengzhou 450052)
  • Received:2006-07-04 Revised:2006-11-20 Published:2007-04-28

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935

被引次数

9

合成了一系列新的含X-型二维液晶基元和反式-4,4'-双(4-羟基苯基偶氮)二苯并-14-冠-4冠醚环的主链型液晶共聚酯. 通过GPC, [η], DSC, TG, WAXD和POM对其液晶性研究发现, 所有的共聚酯都呈现出向列相的丝状织构或纹影织构. 共聚酯的熔融温度(Tm)和各向同性温度(Ti)随共聚酯分子中反式-4,4'-双(4-羟基苯基偶氮)二苯并-14-冠-4用量的改变呈规律性变化.

关键词: X-型二维液晶基元, 二苯并-14-冠-4, 液晶共聚酯

A novel series of main chain liquid crystalline copolyesters with X-shaped two-dimensional mesogenic units and crown ether cycles of trans-4,4'-bis(4-hydroxyphenylazo)dibenzo-14-crown-4 were synthesized and their mesomorphic properties were studied through GPC, [η], DSC, TG, WAXD and POM. It was found that all the copolyesters showed the thread texture or schlieren texture. Their melting temperature (Tm) and isotropization temperature (Ti) were changed regularly with varying the trans-4,4'-bis- (4-hydroxyphenylazo)dibenzo-14-crown-4 unit content in the co-polyesters.

Key words: X-shaped two-dimensional unit, dibenzo-14-crown-4, liquid crystalline copolyester