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相关概念视频

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

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Fabrication Process of Silicone-based Dielectric Elastomer Actuators
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高一致性皮泡的制品

Timo Hofmann1, Ralf-Urs Giesen1, Hans-Peter Heim1

  • 1Polymer Engineering, Institute of Material Engineering, University of Kassel, 34125 Kassel, Germany.

Polymers
|May 11, 2024
PubMed
概括

用吹气剂泡高一致性膠,可降低成本和重量. 化学吹剂产生的密度最低,而微球和水/混合物对孔隙结构的影响不同,影响机械性能.

科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学

背景情况:

  • 弹性体是传统上使用高一致性进行加工的高性能塑料.
  • 在加工过程中泡塑是一种降低材料成本和重量的途径.

研究的目的:

  • 研究不同物理和化学吹剂对高度的加工影响.
  • 分析所产生的泡的反应动力学,机械性能和形态学.

主要方法:

  • 使用各种物理 (微球,水/混合物) 和化学吹剂加工高一致性.
  • 研究反应动力学,交联行为和泡形态学.
  • 评估机械性能,包括微岸硬度.

主要成果:

  • 与物理吹剂相比,化学吹剂显著影响了交联反应.
  • 化学吹剂在所有测试剂中实现了最低的密度.
  • 微球导致毛孔数量最高,而水/混合物产生了最大的毛孔.
  • 吹气剂机制对泡形态和机械特性 (如微型海岸硬度) 产生了重大影响.

结论:

  • 吹剂的选择对于控制泡式弹性体的密度,孔隙结构和机械性能至关重要.
关键词:
化学喷雾剂是一种化学喷雾剂.挤出 挤出 挤出 挤出这些微球是微球.过氧化物过氧化物是什么泡是一种泡.水水水的水水的水

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Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
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  • 化学吹剂在密度降低方面具有优势,而物理吹剂在泡形态上提供了明显的控制.