用电发光和自由基激发分析研究的接种聚烯的电树特性
Yaru Zhang1, Wenjia Zhang2, Shixun Hu2
1SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, China.
Physical chemistry chemical physics : PCCP
|February 6, 2024
概括
用MMA植入聚烯 (PP) 抑制了电树的生长. 这项研究使用电子偏磁共振 (EPR) 和电光发射 (EL) 揭示了移植的PP中较窄的带间隙,促进了电子激发和解释了树抑制.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学是一种材料科学.
- 电气工程 电气工程 电气工程
背景情况:
- 聚烯 (PP) 等聚合物中的电树是关键的故障机制.
- 了解电树抑制的基本机制对于提高材料性能至关重要.
研究的目的:
- 为了研究在纯净和移植的PP中在电动树木化过程中产生的自由基.
- 通过先进的特征化技术,阐明了在移植PP中抑制电树的机制.
主要方法:
- 电子磁共振 (EPR) 谱学用于研究自由基.
- 电光发射 (EL) 和激发计算用于分析电子运动和电子结构.
- 纯 PP 和移植 PP (PP-g-MMA) 的电树形成行为的比较.
主要成果:
- 与纯 PP 相比,在移植的 PP (PP-g-MMA) 中,电树的生长被显著抑制.
- 接种PP具有更窄的带间隙,允许更容易的电子激发.
- 尽管树长较短,但由于电子分布不均,移植PP显示出更强烈的EPR信号.
结论:
- 接种PP中的更窄的带间隙促进了电子激发,导致抑制电树形成.
- EPR和EL研究提供了对控制树抑制的电子结构和电子动态的见解.
- 接种PP显示了用于电绝缘应用的增强介电特性.
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