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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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Updated: Jun 29, 2026

Shape Memory Polymers for Active Cell Culture
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生物医学应用的多面形状记忆聚合物技术:结合自我软化和伸展性质.

Chandani Chitrakar1, Marc Anthony Torres1, Pedro Emanuel Rocha-Flores2

  • 1Department of Biomedical Engineering, University of North Texas, Denton, TX 76203, USA.

Polymers
|November 14, 2023
PubMed
概括

研究人员通过添加二烯酸链延长剂来增强柔性乙烯聚合物,改善可穿戴设备等生物医学应用的伸展性. 这些新的乙烯/烯酸聚合物表现出灵活性,伸展性和形状记忆.

关键词:
合规聚合物的合规聚合物.柔性聚合物柔性聚合物聚合物表征的聚合物表征自软化聚合物自软化聚合物形状记忆的聚合物聚合物.可拉伸的聚合物聚合物硫乙烯/烯酸聚合物

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Last Updated: Jun 29, 2026

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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
  • 生物材料工程 生物材料工程

背景情况:

  • 乙烯聚合物是用于诸如器官芯片,微流体,药物输送和伤口愈合等应用的多功能生物材料.
  • 这些聚合物具有固有的灵活性,软化和形状记忆性能,但往往缺乏先进生物医学设备所需的伸展性.

研究的目的:

  • 为了提高柔性乙烯聚合物的伸展性和可塑性.
  • 调查二烯酸盐链延长剂,特别是聚乙烯糖醇二烯酸 (PEGDA) 的纳入乙烯聚合物网络的情况.

主要方法:

  • 使用1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H) -trione (TATATO),Trimethylolpropanetris (3-mercaptopropionate) (TMTMP) 和PEGDA (Mn 250和Mn 575) 的烯酸/烯酸聚合物的合成.
  • 使用富里埃变换红外光谱法 (FTIR) 进行表征,以确认单体反应.
  • 通过单轴拉伸试验和热力学分析评估机械性能,以评估扬斯模块,断裂应变和玻璃过渡温度 (Tg).

主要成果:

  • FTIR证实了合成的乙烯/烯酸聚合物的完整单体反应.
  • 添加5%重量的PEGDA 575显著软化了聚合物,使Young's Modulus从1.12 GPa降低到260 MPa (在生理条件下进一步降低到15 MPa).
  • 随着PEGDA 575的纳入,骨折应变率从55%增加到92%,表明增强了伸展性. 此外,PEGDA还允许调整玻璃过渡温度.

结论:

  • 结合二烯酸链延长剂的烯酸/烯酸聚合物显示出显著提高的灵活性和伸展性.
  • 这些修改过的聚合物具有可调节的机械性能和形状记忆效应,使它们适用于苛刻的生物医学应用.
  • 开发的乙烯/烯酸盐材料代表了灵活,可拉伸和形状记忆的生物材料的有希望的进步.