• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Liquid crystallization of poly(styrene-co-maleic anhydride) induced by intermolecular hydrogen bonds
【24h】

Liquid crystallization of poly(styrene-co-maleic anhydride) induced by intermolecular hydrogen bonds

机译：分子间氢键诱导的聚苯乙烯-马来酸酐共聚物的液晶化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The liquid crystallization of general polymer (GP) with maleic anhydride in the main chain has been realized through molecular recognition and self-assembly based on intermolecular hydrogen bonds. Poly[styrene-co-(N-4-carboxylphenyl)maleimide] (SMIBA) was synthesized by imidization and dehydration of Poly(styrene-co-maleic anhydride) (SMA) with p-aminobenzoic acid (ABA) for use as an H-bonded donor polymer. 4-Methoxy-4 prime -stilbazole (MSZ) and 4-nitro-4 prime -stilbazole (SZNO2) were prepared as an H-bonded acceptor. SMIBA was complexed with MSZ or SZNO2 by slow evaporation from pyridine solution to form a self-assembly, which exhibits the mesophase, while neither of the individual components is mesogenic. The phase diagrams of a variety of mixtures between of SMIBA and stilbazoles have been established using DSC and POM. They show complete miscibility and high thermal stability of the liquid crystalline phase over the whole composition range. The tuning of liquid crystalline properties was achieved by changing the composition of the mixture and involving it with a mixture of SZNO2 and MSZ. IR measurements strongly support the existence of an H-bonded complex between the carboxylic acid of SMIBA and the pyridine group of stibazoles. Unlike conventional side-chain liquid crystalline polymer (SLCP), supramolecular SLCP with a lower molecular weigh polymeric donor has higher thermal stability of the liquid crystalline phase due to the microphase separated in the hydrogen bonding case. Liquid crystallization of GP, such as SMA, induced by hydrogen bonds, offers a new route to prepare functional material with controlled molecular architecture from readily accessible and simpler precursors.
机译：通过分子识别和基于分子间氢键的自组装，实现了主链上带有马来酸酐的普通聚合物（GP）的液晶化。聚[苯乙烯-co-（N-4-羧基苯基）马来酰亚胺]（SMIBA）是通过将聚（苯乙烯-马来酸酐）（SMA）与对氨基苯甲酸（ABA）进行酰亚胺化和脱水合成的键合的供体聚合物。制备4-甲氧基-4伯-噻唑（MSZ）和4-硝基-4伯-噻唑（SZNO2）作为氢键受体。通过从吡啶溶液中缓慢蒸发，使SMIBA与MSZ或SZNO2络合，形成自组装，表现出中间相，而各个组分都不是介晶的。使用DSC和POM已建立了SMIBA和stilbazoles之间各种混合物的相图。它们在整个组成范围内显示出液晶相的完全可混溶性和高热稳定性。通过改变混合物的组成并使其与SZNO 2和MSZ的混合物一起来实现液晶性质的调节。红外测量结果强烈支持SMIBA的羧酸和替硝唑的吡啶基之间存在H键结合的配合物。与常规的侧链液晶聚合物（SLCP）不同，具有较低分子量的聚合物供体的超分子SLCP由于在氢键作用下分离出的微相而具有较高的液晶相热稳定性。由氢键诱导的GP（例如SMA）的液晶化为从易于获得且更简单的前体制备具有受控分子结构的功能材料提供了新途径。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号