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相关概念视频

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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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...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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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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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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高度和高强度的无溶剂线性多聚离子液体弹性体

Lingling Li1, Xiaowei Wang1, Shuna Gao1

  • 1Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Suzhou Key Laboratory of Soft Material and New Energy, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.

Advanced materials (Deerfield Beach, Fla.)
|October 10, 2023
PubMed
概括

研究人员使用超分子网络开发了高强度,无溶剂的多离子液体弹性体. 这些材料具有自我修复性,可回收性,并有可能用于先进的灵活传感器和人机交互.

关键词:
裂传播不敏感性 不敏感性高强度的高强度的强度.聚离子液体) 弹性体) 弹性体.可回收利用的可回收利用.这是一个超分子的超分子.

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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
  • 纳米技术 纳米技术

背景情况:

  • 无溶剂弹性体避免了在凝中常见的蒸发和泄漏等问题.
  • 在离子弹性体中实现高性仍然是一个重大挑战.
  • 离子液体为先进材料开发提供独特的特性.

研究的目的:

  • 为了制造高强度的线性多离子液体 (PIL) 弹性体,而无需化学交叉连接.
  • 研究这些新型弹性体的机械性能和传感器应用.
  • 探索来自超分子网络的自我愈合和可回收特性.

主要方法:

  • 甲酸盐离子液 (IL) 单体的聚合,形成超分子离子网络.
  • 机械性能的表征,包括强度,模量,性和断裂能量.
  • 基于PIL弹性体的应变,压力和触摸传感器的制造和测试.

主要成果:

  • 高强度线性PIL弹性体成功合成,具有高强度 (16.5 MPa),模量 (157.49 MPa) 和性 (130.31 MJ m-3).
  • 材料表现出极好的裂传播无敏性,裂能量为243.37 kJ m-2 .
  • 皮尔弹性体传感器具有很高的灵敏度,材料具有自我愈合和可回收的特性.

结论:

  • 高分子离子网络使得高性能,无溶剂的PIL弹性体的制造成为可能.
  • 这些材料具有卓越的机械性能和自我修复能力.
  • 开发的PIL弹性体在灵活的传感器设备,健康监测和人机交互方面显示出重大前景.