| 含对硝基偶氮苯侧基的丙烯酸酯类液晶聚合物的超分子结构 |
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| 引用本文： | 李敏,周恩乐,徐纪平. 含对硝基偶氮苯侧基的丙烯酸酯类液晶聚合物的超分子结构[J]. 高等学校化学学报, 1995, 16(4): 635 |
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| 作者姓名： | 李敏 周恩乐 徐纪平 |
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| 作者单位： | 中国科学院长春应用化学研究所高分子物理联合开放实验室, 长春, 130022 |
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| 基金项目： | 国家基础性重大关键项目 |
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| 摘 要： | 利用DSC、偏光显微镜和广角X射线衍射(WAXD)等手段研究了含对硝基偶氮苯侧基的丙烯酸酯类均聚物HPn(n=3,4.6)及其与丙烯酸的共聚物Pn(n=3,4,6,8)的相行为,结果表明:HP6可形成向列型液晶相,其相态特征可表示为:Tg,308.9K、TKN342K、TNI401K,HP3和NP4为非液晶聚合物;Pn可形成近晶型液晶相。WAXD结果指出其d/l介于1.40～1.54之间,故其液晶相具有SAd型分子排布特征。对共聚物Pn的变温FTIR研究表明:Pn中存在着-COOH和-NO2的氢键作用,使介晶基团之间的各向异性相互作用增强,有利于形成更加有序和稳定的近晶型液晶相。结合WAXD和FTIR的结果,给出了Pn液晶相的分子排布模型。
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| 关 键 词： | 侧链液晶聚合物 聚丙烯酸酯 对硝基偶氮苯 |
| 收稿时间： | 1994-05-17 |
Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene |
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| LI Min,ZHOU En-Le,XU Ji-Ping. Ultrastructure of Liquid Crystalline Polyacrylates Containing p-Nitro Azobenzene[J]. Chemical Research In Chinese Universities, 1995, 16(4): 635 |
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| Authors: | LI Min ZHOU En-Le XU Ji-Ping |
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| Affiliation: | Polymer Physics Laboratory of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 |
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| Abstract: | The phase behaviour of the side chain liquid crystalline polyacrylates containing pnitro azobenzene was studied by DSC,WAXD and the polarized optical micioscopy. It was shown that nematic phase can be formed for hmopolymer HP6,no LC phase can be observed for HP3 and HP4; whereas smectic SAd phase can be obtained for Pn when n was equal to 3,4, 6,8. The unique phase behaviour of the copolymers Pn was due to the existence of H bond between-COOH and-NO2 which has been confirmed by FTIR. The molecular arrangement of the copolymers in their LC states was proposed from the results of WAXD and FTIR. |
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| Keywords: | Side chain liquid crystalline polymers Polyacrylate p-Nitro azobenzene |
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