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相关概念视频

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.7K
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...
2.7K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.4K
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...
2.4K
Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

71
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
71
Polymers: Molecular Weight Distribution01:10

Polymers: Molecular Weight Distribution

3.3K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
3.3K

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相关实验视频

Updated: Jun 11, 2025

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process
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编辑:先进的聚合物复合材料:加工,建模,性能和应用II.

Giorgio Luciano1, Maurizio Vignolo1

  • 1National Research Council of Italy-Institute of Chemical Sciences and Technologies "Giulio Natta" CNR SCITEC, Via De Marini 6, 16149 Genova, Italy.

Polymers
|September 28, 2024
PubMed
概括

本系列探讨了先进的复合材料,突出了创新和应用. 发现各种行业的材料科学和工程的最新研究.

科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物科学 聚合物科学
  • 工程 工程师 工程师 工程师

背景情况:

  • 本专题刊物介绍了对复合材料的精选研究.
  • 它是继前一个系列的成功之后,证明了对该领域的持续兴趣.

研究的目的:

  • 为了呈现一个精心策划的集合的复合材料的最新进展.
  • 涵盖各种各样的方面,包括设计,制造和应用.
  • 促进该领域的进一步研究和创新.

主要方法:

  • 这本收藏包含同行评审的文章和评论.
  • 贡献涵盖了复合材料研究的广泛范围.
  • 方法从理论建模到实验验证.

主要成果:

  • 该系列突出显示了聚合物复合材料,金属矩阵复合材料和陶矩阵复合材料等领域的新发现.
  • 介绍了新的加工技术和表征方法.
  • 展示了航空航天,汽车和生物医学领域的成功应用.

结论:

  • 复合材料在各种行业中继续提供显著的优势.

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  • 持续的研究对于释放这些先进材料的全部潜力至关重要.
  • 该收藏是研究人员和从业人员的宝贵资源.