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Classification and Mechanical Properties of Synthetic Polymers01:28

Classification and Mechanical Properties of Synthetic Polymers

Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...

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相关实验视频

Updated: Jun 25, 2026

Shape Memory Polymers for Active Cell Culture
10:53

Shape Memory Polymers for Active Cell Culture

Published on: July 4, 2011

光诱导形状记忆的聚合物.

Andreas Lendlein1, Hongyan Jiang, Oliver Jünger

  • 1GKSS Research Center Geesthacht GmbH, Institute of Chemistry, Kantstrasse 55, D-14513 Teltow, Germany. Lendlein@gkss.de

Nature
|April 15, 2005
PubMed
概括
此摘要是机器生成的。

含有肉基的聚合物可以使用紫外线塑造形状. 这些光激活形状记忆聚合物可以在环境温度下恢复它们的原始形状,从而实现新的应用.

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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Last Updated: Jun 25, 2026

Shape Memory Polymers for Active Cell Culture
10:53

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Published on: July 4, 2011

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09:37

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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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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 摄影化学的使用.

背景情况:

  • 形状记忆材料在外部刺激后恢复其原始形状.
  • 形状记忆聚合物 (SMP) 正因其科学和技术重要性而受到越来越多的关注.
  • 之前已经报道过聚合物和凝的光诱导的形状变化.

研究的目的:

  • 为了研究含有肉基的聚合物的光诱导形状记忆效应.
  • 为了证明使用紫外线将聚合物固定到预先确定的临时形状的能力.
  • 探索在环境温度下远程激活形状恢复.

主要方法:

  • 使用紫外线 (UV) 光,变形和固定含有肉基的聚合物.
  • 固定形状在高温 (高达50°C) 的稳定性测试.
  • 在环境温度下暴露于不同波长的紫外线光线时引发的形状恢复.

主要成果:

  • 含有肉基的聚合物可以通过紫外线照明被变形成各种预先确定的形状 (膜,管,弧形,螺旋形).
  • 这些临时形状表现出长期的稳定性,即使在50°C.
  • 在暴露于不同波长的紫外线光下,在环境温度下恢复原始形状.

结论:

  • 含有肉基的聚合物表现出一种光诱导的形状记忆效应.
  • 远程光源激活允许在环境温度下形成和恢复预先确定的形状.
  • 这项技术具有各种应用的潜力,包括医疗用途.