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相关概念视频

Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

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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...
1.7K

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在结晶固化系统PCL-DGEBAA中调节相位结构的调节

Irina O Plyusnina1, Uliana V Nikulova1, Ramil R Khasbiullin1

  • 1Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS), 31, Building 4 Leninsky Prospect, Moscow 119071, Russia.

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概括

这项研究探讨了聚烯酸-环氧树脂系统中相位结构的形成. 研究人员发现,控制固化温度和度可以精确调节相位结构,尺寸和成分,以优化材料性能.

关键词:
总局EBA和DGEBA的总干事.环氧树脂是一种环氧树脂.相互扩散的扩散.相互透的阶段相互透.一个相位图的相位图.阶段逆转区域是相位逆转区域.阶段结构的阶段结构.聚卡普罗拉克托尼 (polycaprolactone) 是一种具有多种性质的药物.

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Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices
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Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
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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
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 了解相位结构的形成对于定制复合材料特性至关重要.
  • 反应性热塑性系统通过受控固化提供可调节的特性.

研究的目的:

  • 调查聚烯酸-环氧树脂/4,4'-二胺二硫系统中相位结构形成的定性和定量方面.
  • 建立一种方法来确定影响相位结构的温度度参数.
  • 为了将结构特征与固化条件和操作性质相关联.

主要方法:

  • 阶段图构造和进化跟踪与日益增长的环氧组转换.
  • 光学干扰测量用于确定温度度参数.
  • 光学和扫描电子显微镜用于研究相位结构和形态学.
  • 用FTIR光谱和差分扫描热量计 (DSC) 进行相位组合分析.

主要成果:

  • 构建了一个相位图,展示了具有较低临界溶液温度的无形分离.
  • 开发了方法来确定控制相位结构类型的参数.
  • 结构元素的尺寸与固化温度和度相关.
  • 阶段组成被详细分析.

结论:

  • 固化过程中温度度参数的变化使相结构类型,大小和组成的特定调节成为可能.
  • 这种控制直接影响复合材料的最终操作性能.