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相关概念视频

Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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...
Determination of Molar Masses of Polymers II01:27

Determination of Molar Masses of Polymers II

Polymer samples typically consist of macromolecular chains with a distribution of lengths, resulting in a range of molar masses rather than a single discrete value. Conventional descriptors such as the number-average molar mass and weight-average molar mass quantify this distribution but do not fully capture polymer behavior in solution..The viscosity-average molar mass provides a more realistic description of polymer behavior in solution because it accounts for the enhanced contribution of...

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相关实验视频

Updated: Jun 25, 2026

Synthesis of Thermogelling PolyN-isopropylacrylamide-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering
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Published on: October 26, 2016

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基于碎片的热导电性预测建模,用于封闭的半孔聚合物凝.

Haiyan Yu1, Mingdong Li1, Ning Guo1

  • 1Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China.

Gels (Basel, Switzerland)
|June 25, 2025
PubMed
概括

这项研究提出了一种新的模型,用于预测半孔聚合物凝的隔热性能. 该模型准确地预测了热性能,确定了可孔性和细胞大小的最佳范围,以提高热管理.

关键词:
碎形建模的模型.半孔聚合物凝是一种半孔聚合物凝.在微观尺度上传热的转移.微观尺度的热辐射.导热率 导热率 导热率 导热率 导热率 导热率

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Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels
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Sample Preparation in Quartz Crystal Microbalance Measurements of Protein Adsorption and Polymer Mechanics
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Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels
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科学领域:

  • 材料科学 材料科学 材料科学
  • 热力工程是热力工程中的一个.
  • 应用物理 应用物理

背景情况:

  • 封闭的中孔聚合物凝是先进的绝热材料.
  • 轻量特性和热管理是关键特性.
  • 准确预测热性能对于材料设计至关重要.

研究的目的:

  • 开发一种新的数学模型,用于预测封闭的半孔聚合物凝的热性能.
  • 为了整合碎形几何学,Kirchhoff的原理,罗斯兰近似和Mie散射理论.
  • 分析各种参数对导热率的影响.

主要方法:

  • 开发了一个数学模型,结合了碎形几何学,Kirchhoff的导热原理,罗斯兰扩散近似和Mie散射理论.
  • 基于对角交叉碎形结构的导电热导率.
  • 考虑微尺度辐射效应的衍生辐射导热率.

主要成果:

  • 模型预测显示,与中孔聚合物凝实验结果有很强的一致性 (预测误差<11.2%).
  • 参数分析揭示了多孔度,细胞大小,温度,折射率和灭绝系数的影响.
  • 确定了细胞大小 (1-100微米) 和多孔度 (0.74-0.97) 的临界范围,以达到最小的导热率.

结论:

  • 拟议的模型提供了一个强大的理论工具,用于预测隔热性能.
  • 该模型有助于设计和优化用于热管理的半孔聚合物凝.
  • 这些发现推动了这些材料在能源转换和管理系统中的应用.