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相关概念视频

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
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精密无异型刷聚合物通过序列控制化学

Chaojian Chen1,2, Katrin Wunderlich1, Debashish Mukherji1,3

  • 1Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany.

Journal of the American Chemical Society
|December 13, 2019
PubMed
概括

研究人员使用蛋白质作为脊柱来设计异型刷聚合物. 这种方法可以精确控制高分子架构和功能,用于先进的纳米科学和生物医学应用.

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科学领域:

  • 软材料合成
  • 大分子化学
  • 纳米技术

背景情况:

  • 在分子层面控制纳米材料的结构和功能是软材料合成的关键挑战.
  • 大自然利用蛋白质进行精确的功能性大分子合成,这种能力很难通过合成复制.
  • 蛋白质提供了一个有前途的支架,用于创建复杂的,功能性的宏分子结构.

研究的目的:

  • 开发一种使用生物分子构建具有可控长度和功能的异型刷聚合物的方法.
  • 展示这些工程聚合物的特定位置自组装到更高层次的架构.
  • 探索这种基于蛋白质的宏分子平台在纳米科学和生物医学中的潜力.

主要方法:

  • 使用蛋白质作为宏分子骨干的"移植"策略.
  • 在人类血清白蛋白中化学修改单个半氨酸残留物以实现功能不对称的配置.
  • 采用生物 - 斯特雷普塔维丁相互作用用于特定位置的自我组装和更高层次的结构形成.
  • 进行系统的实验和计算研究以验证方法.

主要成果:

  • 通过使用蛋白质成功构建了具有单分散长度的异型刷聚合物.
  • 实现了蛋白质骨干的位置单一功能.
  • 通过生物 - 斯特雷普塔维丁链接证明了特定地点的自我组装到有序架构.
  • 通过全面的实验和计算分析验证了该方法.

结论:

  • 蛋白质作为有效的固有宏分子脊柱,用于合成异型刷聚合物.
  • 开发的策略可以精确控制聚合物架构和特定地点的自组装.
  • 这种宏分子平台为纳米科学和生物医学应用提供了新的设计视角.