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相关概念视频

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.6K
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...
2.6K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.7K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.7K

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相关实验视频

Updated: May 20, 2025

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

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具有可逆自报告特性的动态交联聚乙烯类材料.

Alessandro Torri1, Chiara Paravidino2, Gabriele Giovanardi1

  • 1Department of Chemistry, Life Sciences and Environmental Sustainability and INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy. roberta.pinalli@unipr.it.

Materials horizons
|March 27, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种可回收,自我报告的热聚合物,使用罗达胺机制. 这种创新的材料在压力下自我修复并发出损伤信号,与可持续塑料的循环经济目标保持一致.

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

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相关实验视频

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 循环经济是一个循环经济.

背景情况:

  • 耐热聚合物广泛使用,但由于它们的永久交叉连接,很难回收利用.
  • 开发可回收的热对于推进材料科学中的循环经济原则至关重要.

研究的目的:

  • 创建一个可再加工和自我报告的基于聚乙烯的热聚合物.
  • 整合一个机械,用于压力诱导的信号和热自我愈合能力.

主要方法:

  • 在聚乙烯矩阵中利用基于罗达胺的机械作为交联剂.
  • 采用乙烯交换化学物质用于可逆共价键的形成.
  • 研究了压力诱导的光变化和自我愈合的热刺激.

主要成果:

  • 成功开发了一种通过光变化表现出可逆应激反应的耐热剂.
  • 由热刺激触发的有效自我愈合和可重复使用.
  • 罗达胺机械提供了稳定,可见的信号,而不会改变聚合物骨干.

结论:

  • 开发的耐热材料为实现功能增强的可持续塑料提供了一个有前途的途径.
  • 自报和自我修复性质的结合促进了材料的寿命和可回收性.
  • 这项工作有助于设计符合循环经济框架的先进材料.