| 羧酸侧基对主链液晶聚合物性能的影响 |
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| 引用本文： | 田梅,丛越华,楚慧姝,梁光旭,张宝砚.羧酸侧基对主链液晶聚合物性能的影响[J].高分子材料科学与工程,2010(5):97-99,103. |
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| 作者姓名： | 田梅 丛越华 楚慧姝 梁光旭 张宝砚 |
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| 作者单位： | 东北大学分子科学与工程中心 |
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| 基金项目： | 863计划(863-2006AA02Z291);国家自然科学基金资助项目(50673105) |
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| 摘 要： | 采用溶液缩聚的方法,以4,4′-对羟基联苯(MB)、2,5-二羟基苯甲酸(MC)、癸二酰氯(SD)为单体,合成了主链液晶离聚物。通过红外光谱(FT-IR)、偏光显微镜(POM)、差示扫描量热(DSC)、X射线衍射(XRD)等手段研究了离子单体对主链液晶离聚物性能的影响。结果表明,所合成的聚合物都为热致近晶型液晶聚合物。其Tg,Tm和Ti随离子含量的增加呈现不同的变化趋势,少量的2,5-二羟基苯甲酸钠(MC-Na)增宽了聚合物的液晶区间,但较大量的MC-Na破坏了液晶相。
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| 关 键 词： | 主链液晶离聚物 羧酸 合成 |
Influence of Carboxylic Acid on the Mesomorphic Properties of Main-Chain Liquid-Crystalline Polymers |
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| TIAN Mei,CONG Yue-hua ,CHU Hui-shu,LIANG Guang-xu,ZHANG Bao-yan.Influence of Carboxylic Acid on the Mesomorphic Properties of Main-Chain Liquid-Crystalline Polymers[J].Polymer Materials Science & Engineering,2010(5):97-99,103. |
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| Authors: | TIAN Mei CONG Yue-hua CHU Hui-shu LIANG Guang-xu ZHANG Bao-yan |
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| Affiliation: | (Center for Molecular Science and Engineering,Northeastern University,Shenyang 110004,China) |
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| Abstract: | A series of new main-chain liquid-crystalline polymers were prepared by solution polycondensation reactions of sebacyl chloride(SD) and various amounts of 2,5-dihydroxybenzoic (MC) and 4,4′-biphenyldid (MB). The mesomorphic properties of the series of main-chain liquid crystalline ionomers (MLCIs) P1～P7 were investigated by means of Fourier transform infrared spectroscopic(FT-IR),differential scanning calorimetry (DSC) ,polarization microscope(POM) and X-ray. Experiment results show that P1～P7 are thermotropic liquid crystal polymers and that they are smectic MLCIs,Tg,Tm and Ti change differently with the increasing content of MC-Na in the polymers. The introduction of MC-Na into polymers can widen the range of mesophase,but the mesomorphic properties of the MLCI are destroyed by large quantity of the MC-Na. |
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| Keywords: | main-chain liquid-crystalline polymers carboxylic acid synthesis |
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