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相关概念视频

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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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.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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Polymers02:34

Polymers

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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...
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Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
3.3K
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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Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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相关实验视频

Updated: May 10, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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机器学习用于开发可持续的聚合物

Ziyu Huo1, Xiaoyu Xie1, Rong Tong1

  • 1Department of Chemical Engineering, Virginia Polytechnic Institute and State University, 635 Prices Fork Road, Blacksburg, Virginia, 24061, USA.

Chemistry (Weinheim an der Bergstrasse, Germany)
|April 23, 2025
PubMed
概括
此摘要是机器生成的。

机器学习加速了从可再生资源中发现可持续聚合物的发现. 与传统方法相比,这种方法提高了效率并减少了环境影响.

关键词:
贝叶斯的优化是贝叶斯的优化.机器学习是机器学习.聚聚是什么意思 聚聚是一种可持续的聚合物聚合物

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Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder
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科学领域:

  • 聚合物科学 聚合物科学
  • 材料科学 材料科学 材料科学
  • 可持续化学 可持续化学

背景情况:

  • 对环保材料的日益增长的需求推动了对可持续聚合物的兴趣.
  • 传统的聚合物开发效率低且资源密集.
  • 机器学习 (ML) 提供先进的预测和发现能力.

研究的目的:

  • 审查ML应用中的新兴趋势,以实现可持续的聚合物开发.
  • 专注于ML在催化剂发现,性能优化和聚合物设计中的作用.
  • 在可持续的聚合物科学中确定ML的挑战和解决方案.

主要方法:

  • 在可持续的聚合物科学中对ML应用的文献综述.
  • 对催化剂发现的ML技术的分析.
  • 检查ML用于属性预测和优化.
  • 在新型聚合物设计中探索ML.

主要成果:

  • ML显著加快了可持续聚合物的识别和设计.
  • ML有助于优化聚合物特性,用于特定的应用.
  • 关键的挑战包括数据稀缺性和模型可解释性.
  • 解决方案包括转移学习和基于物理的ML.

结论:

  • ML是推动可持续聚合物研究的变革性工具.
  • 解决ML挑战对于释放其全部潜力至关重要.
  • 未来的工作应该专注于高效材料设计的集成ML方法.