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相关概念视频

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

3.6K
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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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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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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Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

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Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred...
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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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机器学习辅助高效发现和合理设计热导聚合物的导热性聚合物.

Xiang Huang1, Shaobo Song1, Yongqiang Chen2

  • 1School of Low-carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China.

ACS applied materials & interfaces
|December 22, 2025
PubMed
概括

研究人员开发了一个机器学习框架,以发现和设计具有高导热性 (TC) 的聚合物. 这加速了用于灵活电子和热管理的先进材料的创造.

关键词:
深度神经网络是一个神经网络.反向设计的设计.机器学习是机器学习.聚合物聚合物的聚合物.快速选 快速选 快速选 快速选 快速选导热率 导热率 导热率 导热率 导热率 导热率

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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
  • 计算化学计算化学

背景情况:

  • 进步的电子技术需要具有增强热管理的材料.
  • 聚合物通常具有较差的导热性,阻碍其在高功率设备中的使用.
  • 聚合物的高热导率 (TC) 对灵活的电子和光电子非常重要.

研究的目的:

  • 开发一种机器学习辅助的框架,用于快速选和高TC的高分子的合理设计 (> 0.40 W m-1 K-1).
  • 加速新型聚合物的发现和设计,用于先进的热管理应用.

主要方法:

  • 利用深度神经网络将聚合物微结构与其导热性相关联.
  • 采用高通量选来识别有前途的聚合物候选物.
  • 集成的蒙特卡罗树搜索和分子生成规则,用于合理设计新结构.
  • 分析了链条刚度,形状和键强度分布对无形系统中TC的影响.

主要成果:

  • 成功选并设计出具有高导热性的聚合物.
  • 确定了链条刚度作为影响聚合物TC的关键因素.
  • 在无形聚合物中建立了链形状,键强度分布和热传输之间的联系.

结论:

  • 拟议的机器学习框架为发现和设计高TC聚合物提供了一种高效的方法.
  • 这一战略加速了用于电子产品热管理的先进聚合物材料的开发.
  • 证明了分子设计原理在优化聚合物热性质方面的重要性.