| 含X-型二维液晶基元的液晶高分子的合成与表征 |
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| 引用本文： | 郑世军,李磊,张淑媛,牛明军,李自法,周其凤.含X-型二维液晶基元的液晶高分子的合成与表征[J].高分子材料科学与工程,1999,15(2):28-31. |
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| 作者姓名： | 郑世军 李磊 张淑媛 牛明军 李自法 周其凤 |
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| 作者单位： | 1. 郑卅大学材料工程系,郑卅,450052
2. 北京大学化学学院高分子科学与工程系,北京,100871 |
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| 摘 要： | 以对苯二甲酰氯和２，５－二羟基－１，４－苯撑双－（对烷氧基苯甲酸酯）为单体，采用低温溶液缩聚方法，合成了一系列含Ｘ－型二维液晶基元的液晶高分子，聚合物的液晶行为用ＤＳＣ和偏光显微镜进行了表征，发现所有的聚合物均为向列型热致液晶高分子，随单体结构改变，聚合物的熔点和液晶态清亮点均呈规律性变化。
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| 关 键 词： | X-型二维液晶基元 液晶高分子 合成与表征 |
SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTAL POLYMERS WITH X-SHAPED TWO-DIMENSIONAL |
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| Zheng Shijun,Li Lei,Zhang Shuyuan,Nu Mingjun,Li Zifa,Zhou Qifeng.SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTAL POLYMERS WITH X-SHAPED TWO-DIMENSIONAL[J].Polymer Materials Science & Engineering,1999,15(2):28-31. |
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| Authors: | Zheng Shijun Li Lei Zhang Shuyuan Nu Mingjun Li Zifa Zhou Qifeng |
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| Affiliation: | Zheng Shijun, Li Lei, Zhang
Shuyuan, Nu Mingjun, Li Zifa; |
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| Abstract: | A series of liquid crystal polymers with x shaped two demensional mesogenic units were synthesized by low temperature solution polycondensation by using terephthalic acid dichlorid and 2,5 dihydroxyl 1,4 phenylene di p alkoxylbenzoate as monomer. The liquid crystalline behavior of the polymers was characterized by DSC and polarizing microscopy with a heating stage. It is found that all the polymers are nematic thermotrpoic liquid crystal polymers. The melting temperature Tm and the clearing temperature Ti of the polymers change regularly with varying of the length of the alkyl substituent groups. |
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| Keywords: | liquid crystalline polymers X shaped two dimensional mesogenic unit synthesis and characterization |
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