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相关概念视频

Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Polymers02:34

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
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基于聚乙烯-聚聚氨和环氧树脂的相互透的聚合物网络.

Chao Feng1, Zhiqiang Song1, Dongdong Xu1

  • 1School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China.

Polymers
|January 28, 2026
PubMed
概括
此摘要是机器生成的。

这项研究开发了固聚氨/环氧 (PU/EP) 相互透的聚合物网络 (IPN),以提高材料性能. 引入聚聚显著改善了机械和粘合性能,为耐用环氧复合材料提供了一个新的战略.

关键词:
环氧树脂 (EP) 是一种相互透的网络结构 (IPN)聚氨 (PU) 是一种聚氨.预聚合物预聚合物

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科学领域:

  • 聚合物科学 聚合物科学
  • 材料科学 材料科学 材料科学
  • 复合材料 复合材料 复合材料

背景情况:

  • 环氧树脂需要硬化,用于更广泛的工程应用,特别是耐久混凝土维修.
  • 开发高性能硬化环氧系统对于先进的材料需求至关重要.

研究的目的:

  • 合成和描述高性能聚氨/环氧 (PU/EP) 相互透的聚合物网络 (IPN).
  • 研究软片段修改对环氧复合材料的机械和粘合性能的影响.

主要方法:

  • 通过预聚合物和逐步方法使用聚聚 (PPG-1000),异酸盐 (MDI-50) 和E51环氧化合物合成PU/EP IPN.
  • 优化了PU预聚合物含量,并通过引入聚聚 (PS-2412),调整了软部分.
  • 评估的机械性能 (拉力强度,破裂时的延长,压力强度) 和粘合强度 (干燥和湿).

主要成果:

  • 最佳的PU预聚合物含量 (重量15%) 在聚乙烯基IPN中产生了平衡的机械性能.
  • 在30/70的比例上加入PS-2412显著提高了拉伸强度 (66.74 MPa),压力强度 (74.24 MPa) 和粘合强度 (5.68 MPa干,4.62 MPa湿).
  • 改进归因于PS-2412的交叉连接密度增加和网络统一性改善.

结论:

  • 该研究提出了一个有效的软段设计策略,用于硬化环氧复合材料.
  • 开发的PU/EP IPN具有强大的机械和粘合性能,适合苛刻的应用.
  • 这项研究通过量身定制的聚合物网络设计,为先进,耐用的环氧材料提供了一条途径.