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| 含X-型液晶基元的液晶高分子的研究 | |
| 引用本文： | 李自法,周其凤,张子勇,裴玉新. 含X-型液晶基元的液晶高分子的研究[J]. 高分子学报, 1990, 0(1): 51-59 |
| 作者姓名： | 李自法 周其凤 张子勇 裴玉新 |
| 作者单位： | 郑州大学化学系，北京大学化学系，郑州大学化学系，郑州大学化学系 郑州，郑州，郑州 |
| 摘 要： | 以4,4′-(烷撑二酰氧)二苯甲酰氯和2,5-二羟基-1,4-苯撑双-(对乙氧基苯甲酸酯)为单体,采用低温缩聚方法,合成了含X-型液晶基元和不同柔性链长度的主链型液晶聚合物。聚合物的液晶行为用DSC、偏光显微镜和X-光衍射进行了表征。对于样品升温消光后又重新出现双折射的异常现象,初步认为是加热过程中分子量提高的结果。 |
| 关 键 词： | 液晶高分子 X-型液晶基元 4,4′-(烷撑二酰氧)二苯甲酰氯 2,5-二羟基-1,4-苯撑双-(对乙氧基苯甲酸酯) |
| 收稿时间： | 1988-07-06 |
STUDY OF LIQUID CRYSTAL POLYMERS WITH X-SHAPED MESOGENS |
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| LI Zi-fa,ZHOU Qi-feng,ZHANG Zi-yong,PEI Yu-xing. STUDY OF LIQUID CRYSTAL POLYMERS WITH X-SHAPED MESOGENS[J]. Acta Polymerica Sinica, 1990, 0(1): 51-59 | |
| Authors: | LI Zi-fa ZHOU Qi-feng ZHANG Zi-yong PEI Yu-xing |
| Affiliation: | Chemistry Department; Zhengzhou University; Zhengzhou; Henan |
| Abstract: | The main chain liquid cryatal polymers with X-shaped mesogens and different flexible spacers were synthesized by solution polycondensations using the monomers 4, 4'-(alkylen-edioyldioxy) dibenzoyl dichloride and 2, 5-dihydroxyl-1, 4-phenylene di-p-ethoxybenzoate. The liquid-crystalline behaviour of the polymers was characterized by DSC, polyarizing microscope and X-ray diffractometre. It was found that at a temperature not much higher than the clearing point of the polymer melts the birefringence will reccur in a few minutes, This unusual behaviour of these polymers is explained as the result of molecular weight increase in the heating process. |
| Keywords: | Liquid crystal polymer X-shaped mesogen 4 4'-(Alkylenedioyldioxy) dibenzpyl dichloride 2 5-dihydroxyl-1 4-phenylene di-p-ethoxybenzoate |
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