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Molecular Weight of Step-Growth Polymers01:08

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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基于碳纳米管复合材料的形状记忆聚合物

Mariana Martins da Silva1, Mariana Paiva Proença2, José António Covas1

  • 1Institute for Polymers and Composites, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.

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研究人员正在将形状记忆聚合物 (SMP) 与碳纳米管 (CNT) 结合起来,以创建先进的软执行器. 这些SMP/CNT复合材料为组织工程和软机器人技术中的应用提供了增强的性能.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物科学 聚合物科学
  • 纳米技术纳米技术

背景情况:

  • 二十年来,研究的重点是将形状记忆聚合物 (SMP) 与碳纳米管 (CNT) 结合起来.
  • 目标是通过CNT增强来增强SMP的机械性能和形状固定性.
  • 此外,CNT的独特特性还使其能够实现诸如电热和光热反应之类的新型启动机制.

研究的目的:

  • 提供关于SMP/CNT复合材料的最新研究的全面审查.
  • 突出CNT在增强SMP属性和启用新功能方面的作用.
  • 探索这些复合材料在软执行器开发中的潜力.

主要方法:

  • 对SMP/CNT复合材料的合成和特征的现有文献的审查.
  • 对专注于热固体和热塑性矩阵的研究进行分析.
  • 研究CNT对纳米复合材料对外部刺激反应的影响.

主要成果:

  • SMP/CNT复合材料表现出增强的机械性能和形状固定性.
  • 在SMP中,CNT的整合使电热和光热的启动成为可能.
  • 这些复合材料具有诸如快速启动,遥控和复杂形状变形等优势.

结论:

  • 对于开发先进的软执行器而言,SMP/CNT复合材料是有希望的.
  • 它们的多功能性和性能特性适合于组织工程和软机器人.
  • 进一步的研究继续释放聚合物纳米复合材料中CNT对外部刺激反应的潜力.