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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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Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
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含有结构粘合剂的基酸.

Md Saleh Akram Bhuiyan1, Kan Wang1, Fatemeh Razaviamri1

  • 1Department of Biomedical Engineering, Michigan Technological University 1400 Townsend Drive Houghton Michigan 49931 USA bplee@mtu.edu.

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|September 23, 2024
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概括
此摘要是机器生成的。

基酸 (SHAM) 显示出作为结构粘合剂的新型粘合分子的前景. 基于SHAM的聚合物对各种表面具有很强的粘附性,性能优于现有的合剂,尽管水稳定性需要进一步研究.

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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
  • 粘附科学 粘附科学 粘附科学

背景情况:

  • 新型粘合物分子的开发对于先进的结构应用至关重要.
  • 沙利基酸 (SHAM) 正被探索为新型粘合剂的潜在构建模块.
  • 了解键在聚合物凝聚和粘附中的作用是关键.

研究的目的:

  • 研究在结构粘合剂设计中使用沙利基酸 (SHAM) 的可行性.
  • 为了评估含有SHAM的聚合物的粘合强度和稳定性.
  • 将基于SHAM的粘合剂的性能与现有的粘合技术进行比较.

主要方法:

  • 合成含有SHAM的聚合物与乙基甲基酸盐 (HEMA) 或甲基乙基酸盐 (MEA) 的骨干.
  • 加入聚乙烯化物 (PVDF) 通过键增强凝聚性.
  • 在玻璃,金属和聚合物基板上测量膝盖剪切粘附强度 (S_adh).
  • 在干燥和潮湿条件下评估粘合剂关节的稳定性.

主要成果:

  • 基于SHAM的粘合剂在各种表面上实现了超过0.9MPa的膝盖剪切粘合强度 (S_adh).
  • 含有较高SHAM含量的配方达到了高达4.8MPa的S_adh值.
  • 基于HEMA的粘合剂由于固有的结合能力而表现出强大的粘合力.
  • 粘合剂在水中48小时后显示S_adh降低了80%,这表明对水分的敏感性.

结论:

  • SHAM是一种可行的新分子,用于开发高性能结构粘合剂.
  • 键在这些材料的凝聚性和粘合性质中起着至关重要的作用.
  • 尽管含有SHAM的粘合剂对水敏感,但与基于甲基醇的粘合剂和环氧相比,它们的性能优越.