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Polymer Classification: Stereospecificity01:26

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
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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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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
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Updated: Jun 16, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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功能化的聚烯共聚合物作为多基板热粘合剂.

Alexander Evans1, Clement G Collins Rice1, Zoë R Turner1

  • 1Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.

ACS applied materials & interfaces
|June 3, 2025
PubMed
概括
此摘要是机器生成的。

用胺基修饰的聚烯被合成,以改善热粘合剂的粘合性. 这些新材料显著增强了对钢和塑料的粘合,在某些情况下性能优于常规粘合剂.

关键词:
热合粘合剂是一种热合粘合剂.腿部剪切的强度强度.多种基质的多种基质.聚烯聚烯的使用方法类风病学 类风病学 类风病学

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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 粘附科学 粘附科学 粘附科学

背景情况:

  • 聚烯 (PP) 对极地基板的粘合性较差,限制了其作为热粘合剂 (HMA) 的使用.
  • 聚乙烯的功能化是一种提高其粘合性能以满足苛刻应用的策略.

研究的目的:

  • 合成和表征氨基修饰聚烯 (PPR) 以提高粘合性能.
  • 为了评估这些修改后的PP作为钢和聚烯基底板的热粘合剂.

主要方法:

  • 通过对聚烯-co-bromo-1-undecene的后改性进行二步合成的氨基改性聚烯 (PPDEA,PPEAE,PPDEOA).
  • 风学和FT-IR特征测定以确认超分子键.
  • 拉皮切割强度测试用于评估钢-钢和钢-塑料基板上的粘合性能.

主要成果:

  • 胺基修饰的PP显示在钢和PP基板上增强了粘合性能.
  • PPEAE和PPDEOA在钢上实现了高粘合力 (16.8和17.4MPa),PPDEOA显示比未经修改的PP增加了252倍.
  • 粘合器故障模式取决于接口效应,PPDEA和PPEAE显示了多基板应用的最佳性能.

结论:

  • 胺基改性聚烯为开发高性能热粘合剂提供了一个多功能平台.
  • 这些功能化的PP具有显著改善的粘合力,与结构粘合剂相比,扩大了它们的应用范围.
  • 合成方法允许定制功能化PP,以满足各种多基板粘合剂的要求.