• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Synthesis and sub-10 nm supramolecular self-assembly of a nanohybrid with a polynorbornene main chain and side-chain POSS moieties
【24h】

Synthesis and sub-10 nm supramolecular self-assembly of a nanohybrid with a polynorbornene main chain and side-chain POSS moieties

机译：具有聚降冰片烯主链和侧链POSS部分的纳米杂交体的合成和10nm以下的超分子自组装

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

A polynorbornene-based mesogen-jacketed liquid crystalline polymer (MJLCP) containing polyhedral oligomeric silsesquioxane (POSS) in the side chain, PNb10POSS, was synthesized through ring-opening metathesis polymerization. The chemical structure of the monomer was confirmed by H-1/C-13 NMR, high-resolution mass spectrometry, and elemental analysis. Molecular characterizations on the polymer were performed with H-1 NMR, gel permeation chromatography, and thermogravimetric analysis. The phase behavior of this new organic-inorganic hybrid polymer was investigated by differential scanning calorimetry, polarized light microscopy, one-dimensional wide-angle X-ray scattering, synchrotron-radiation small-angle X-ray scattering (SAXS), two-dimensional wide-angle X-ray diffraction, and high-resolution transmission electron microscopy. With the competitive self-assemblies of the two covalently connected building blocks, namely MJLCP and POSS moieties, PNb10POSS shows various phase structures including an angstrom POSS crystal (Cr), a hexagonal columnar (Col(h)) phase and the Cr coexisting, and the Col(h) phase at different temperatures. The POSS crystal has a tremendous effect on the liquid crystalline (LC) behavior of the MJLCP. The results show that the competition between the crystallization of POSS and the LC formation of the polymer as a whole results in the complex phase behavior of the MJLCP-based nanohybrid. The polymer self-assembles into an organic-inorganic hybrid inclusion complex on the sub-10 nm scale. This work provides a new approach for the design and synthesis of ordered structures constructed by self-assembly on the sub-10 nm scale.
机译：通过开环易位聚合反应，合成了在侧链中包含多面体低聚倍半硅氧烷（POSS）的聚降冰片烯基介晶夹层液晶聚合物（MJLCP）。单体的化学结构通过H-1 / C-13 NMR，高分辨率质谱和元素分析得到证实。用H-1 NMR，凝胶渗透色谱和热重分析对聚合物进行分子表征。通过差示扫描量热法，偏光显微镜，一维广角X射线散射，同步加速器辐射小角X射线散射（SAXS），二维研究了这种新型有机-无机杂化聚合物的相行为。广角X射线衍射和高分辨率透射电子显微镜。 PNb10POSS通过两个共价连接的结构单元（即MJLCP和POSS部分）的竞争性自组装，显示出各种相结构，包括埃POSS晶体（Cr），六方柱状（Col（h））相和Cr共存，以及在不同温度下的Col（h）相。 POSS晶体对MJLCP的液晶（LC）行为具有巨大影响。结果表明，POSS的结晶与整个聚合物的LC形成之间的竞争导致了基于MJLCP的纳米杂化物的复杂相行为。该聚合物可自组装成10纳米以下的有机-无机杂化包合物。这项工作提供了一种新的方法，用于设计和合成通过在10纳米以下的自组装结构构建的有序结构。

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