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相关概念视频

Polymers02:34

Polymers

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 properties that they exhibit. Additionally,...
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Classification and Mechanical Properties of Synthetic Polymers01:28

Classification and Mechanical Properties of Synthetic Polymers

Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...

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Updated: Jun 29, 2026

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

计对合成聚合物研究的一些应用.

H Morawetz

    Science (New York, N.Y.)
    |February 2, 1979
    PubMed
    概括

    度测量为合成聚合物提供了宝贵的见解,揭示了微观分布和链动态. 这种技术对于理解多电解质溶液,聚合物兼容性和像玻璃过渡这样的过渡至关重要.

    科学领域:

    • 聚合物科学 聚合物科学
    • 分析化学 分析化学
    • 物理化学 物理化学

    背景情况:

    • 度是研究生物大分子的一个关键技术.
    • 它的应用扩展到合成聚合物调查,提供独特的分析能力.

    研究的目的:

    • 突出测在合成聚合物研究中的实用性.
    • 为了证明其在微观层面分析聚合物系统中的应用.

    主要方法:

    • 使用度测量来探测聚合物系统.
    • 分析聚合物溶液中的异质物种分布,特别是聚电解质.
    • 研究连锁流动性,分子间反应和相变.

    主要成果:

    • 度检测揭示了聚合物系统中的微观异质物种分布.
    • 这种技术对于多电解质溶液特别有效.
    • 应用包括研究形状移动性,扩散控制反应,玻璃过渡和聚合物兼容性.

    结论:

    • 度是合成聚合物表征的通用和强大的工具.
    • 它提供了关于聚合物微观结构,动力学和相互作用的详细信息.

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  • 对于进一步了解复杂的聚合物系统至关重要.