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相关概念视频

Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

1.8K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
1.8K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.1K
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

2.2K
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...
2.2K

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相关实验视频

Updated: Jun 18, 2025

Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering
09:15

Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering

Published on: August 14, 2018

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使用结晶动力学建模热塑性球状石生长的算法.

Jamal F Husseini1, Evan J Pineda2, Scott E Stapleton1

  • 1Department of Mechanical Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USA.

Materials (Basel, Switzerland)
|July 27, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种使用动力学来预测局部晶体分布的聚合物结晶模型. 该模型准确模拟球状岩石的形成,并与实验数据进行验证,有助于制造业的微观结构预测.

关键词:
结晶化 结晶化的过程.建模 建模模型 建模模型球状物质是球状物质中的一种.热塑性塑料是一种热塑性材料.

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Optimizing the Growth of Endothiapepsin Crystals for Serial Crystallography Experiments
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Optimizing the Growth of Endothiapepsin Crystals for Serial Crystallography Experiments

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Optimization of Crystal Growth for Neutron Macromolecular Crystallography
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Optimization of Crystal Growth for Neutron Macromolecular Crystallography

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相关实验视频

Last Updated: Jun 18, 2025

Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering
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Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering

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Optimizing the Growth of Endothiapepsin Crystals for Serial Crystallography Experiments
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Optimization of Crystal Growth for Neutron Macromolecular Crystallography
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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
  • 计算建模 计算建模

背景情况:

  • 了解聚合物结晶对于材料性能至关重要.
  • 球状石的形态显著影响了聚合物的性能.
  • 预测模型是优化聚合物加工所需的.

研究的目的:

  • 开发基于结晶运动的球状石生长模型.
  • 为了确定聚合物内的局部晶体分布.
  • 预测各种制造方法的半晶微结构.

主要方法:

  • 利用结晶动力学来模拟核和生长.
  • 使用优化算法来确定局部晶度.
  • 将域区分开为voxels,用于详细的模拟.
  • 根据差异扫描热度计和显微镜数据验证了模型.

主要成果:

  • 该模型成功模拟了同质和异质核和球状石的生长.
  • 根据体积和距离核的距离来确定局部晶度.
  • 模型预测显示与聚乙烯的实验数据有很好的一致性.
  • 分析了冷却速度对晶体分布的影响.

结论:

  • 开发的模型准确地预测了聚合物晶体分布.
  • 该工具有助于理解和控制半晶微结构.
  • 该模型可以集成到多尺度热力学分析中,以改进材料设计.