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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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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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光对齐的聚合物指挥表面:结合,还是混合?

Ameer R K Nassrah1,2, Marianna Batkova3, Natália Tomašovičová3

  • 1Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary.

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概括
此摘要是机器生成的。

与聚甲基甲酸盐 (PMMA) 聚合物化学连接Disperse Red 1 (DR1) 染料显著增强光对齐特性,而不是物理混合它们. 这种功能化促进了更高效的光诱导质量转移,以提高性能.

关键词:
无形聚合物接口接口光学执行器的光学执行器有光学传感器.照片调整对齐方式聚合物空气接口接口

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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
  • 光电学是指光电子产品.

背景情况:

  • 包含染料的聚合物对于光学应用至关重要.
  • 光对齐依赖于光诱导的分子重定位.
  • 了解聚合物-染料相互作用的影响是优化性能的关键.

研究的目的:

  • 为了比较化学功能化与物理混合聚合物系统的光对齐效率.
  • 研究聚合物结构对光感应的表面形态变化的作用.
  • 阐明染剂合聚合物的光诱导质量转移机制.

主要方法:

  • 使用聚甲基甲酸 (PMMA) 和分散红1 (DR1) 染料制造聚合物层.
  • 制备两个不同的系统:在PMMA上化学附着的DR1和在PMMA中物理混合的DR1.
  • 在暴露于光线后使用原子力显微镜 (AFM) 进行光对齐性质和表面形态的表征.

主要成果:

  • 与物理混合系统相比,在使用DR1功能化的PMMA中,光对齐效率明显更高.
  • AFM分析显示,在功能化PMMA的聚合物-空气接口上,存在显著的光诱导质量转移.
  • 制备方法极大地影响了聚合物层的光对齐能力.

结论:

  • 亚染料与聚合物骨干的化学附着提供了比物理混合更优越的光对齐特性.
  • 光诱导质量转移是促进功能化聚合物增强光对齐的关键机制.
  • 通过化学功能化量身定制聚合物染料相互作用是先进光电子材料的有希望的策略.