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首页> 外文期刊>ACS Macro Letters >Conformation of Methylcellulose as a Function of Poly(ethylene glycol) Graft Density
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Conformation of Methylcellulose as a Function of Poly(ethylene glycol) Graft Density

机译：甲基纤维素作为聚（乙二醇）移植物密度的函数

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摘要

Low molecular weight thiol-terminated poly(ethylene glycol) (PEG) (M ≈ 800) has been grafted onto a high molecular weight methylcellulose (MC, Mw ≈ 150000) by a facile thiol–ene click reaction; graft densities varied from 0.7% to 33% (grafts per anhydroglucose unit). Static and dynamic light scattering reveals that the overall radius of the chain increases systematically with graft density, in a manner in excellent agreement with theory. As the contour length remains unchanged, it is apparent that grafting leads to an increase in the persistence length of this semiflexible copolymer, by as much as a factor of 4. These results represent the first experimental verification of the excluded volume theory at low grafting densities, and demonstrate a promising synthetic platform for systematically increasing the persistence length of a model semiflexible, water-soluble polymer.]]>
机译：<！[cdata [ src ='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/amlccd/2017/amlccd.2017.7.issue-11/acsmacrolett.7b00776/20171115/图像/介质/ MZ-2017-007765_0008.gif“>低分子量硫醇封端的聚（乙二醇）（乙二醇）（PEG）（ mμs>≈800）已接枝到高分子量甲基纤维素上（MC ，通过轻巧的硫醇-NE点击反应， m w ≈10c）;移植性密度从0.7％变化为0.7％至33％（每个肺胆葡萄糖单元的移植物）。静态和动态光散射揭示了链条的整体半径系统地随着接枝密度而增加，以优异的理论一致。随着轮廓长度保持不变，显然接枝导致该半聚体共聚物的持久长度的增加，多达4.这些结果代表了低接枝密度下排除的体积理论的第一次实验验证，并展示有希望的合成平台，用于系统地增加模型半成品，水溶性聚合物的持久长度。]>

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  • 来源
    《ACS Macro Letters》 |2017年第11期|共6页
  • 作者

    Svetlana Morozova; Timothy P. Lodge;

  • 作者单位

    Department of Chemistry and Department of Chemical Engineering and Material Science University of Minnesota Minneapolis Minnesota 55455 United States;

    Department of Chemistry and Department of Chemical Engineering and Material Science University of Minnesota Minneapolis Minnesota 55455 United States;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
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