| 聚对偶氮氧苯酚酯系列热致性液晶高分子的相转变 |
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| 引用本文： | 吴平平,陆志豹,周永龙,韩哲文.聚对偶氮氧苯酚酯系列热致性液晶高分子的相转变[J].高分子学报,1995,0(3):315-320. |
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| 作者姓名： | 吴平平 陆志豹 周永龙 韩哲文 |
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| 作者单位： | 华东理工大学高分子材料系，中国科学技术大学结构成分分析开放实验室 |
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| 摘 要： | 合成含有不同亚甲基数（ｎ＝４—１２，１４）的主链型热致性液晶高分子──聚对偶氮氧苯酚二元羧酸酯．用ＤＳＣ和ＦＴＩＲ观测了相转变的奇偶效应，揭示了液晶相转变过程中分子间相互作用力性质的变化．并与聚２，２＇－二甲基对偶氮氧苯酚二元羧酸酯系列进行了比较，讨论了中介单元的对称性对液晶高聚物相转变和对液晶相稳定性的影响．
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| 关 键 词： | 热致性液晶高分子，相转变，FTIR，DSC |
| 收稿时间： | 1993-07-20 |
STUDY OF PHASE TRANSITION OF THERMOTROPIC LIQUID CRYSTAL PAB SERIES BY FTIR |
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| WU Ping-ping,LU Zhi-bao,ZHOU Yong-long,HAN Zhe-wen.STUDY OF PHASE TRANSITION OF THERMOTROPIC LIQUID CRYSTAL PAB SERIES BY FTIR[J].Acta Polymerica Sinica,1995,0(3):315-320. |
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| Authors: | WU Ping-ping LU Zhi-bao ZHOU Yong-long HAN Zhe-wen |
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| Institution: | Department of Polymer; East China University of Science and Technology; Shanghai 200237; Structure Research Laboratory; University of Science and Technology of China; Hefei 230026 |
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| Abstract: | Thermotropic liquid crystal poly (4,4'-oxyazoxybenzene ester) (PAB)series with different number of methylene group in flexible unit have been synthesized.The odd-even effect of phase transition temperature has been obviously observed by DSC measurement. The nature and the main factor of odd-even effect have been investigated by dynamic FTIR. The effect of symmetric structure of mesogenic unit in main chain on the phase transition temperature of liquid crystal polymer has been discussed by comparing with poly (2,2'-dimethyl,4,4'-oxyazoxybenzene ester) series. |
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| Keywords: | Thermotropic liquid crystal polymer Phase transition FTIR DSC |
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