机械上不同的机械染色体使玻璃聚合物和弹性体网络中的分子力量的校准和验证成为可能
Raphael Hertel1, Maximilian Raisch1, Michael Walter2
1Department of Polymer Chemistry, Institute for Chemistry, Chemnitz University of Technology, Str. der Nationen 62, 09111, Chemnitz, Germany.
Angewandte Chemie (International ed. in English)
|August 13, 2024
概括
机械色的捐赠-接受器 (DA) 弹,当伸展时,改变颜色. 这项研究对这些分子力传感器进行校准,以测量聚合物内部的力,从而能够实时监测各种聚合物材料中的分子力.
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
- 频谱学是一种光谱学.
背景情况:
- 硬质扭曲的捐赠-接受 π 系统 (DA 弹) 呈现机色,在机械负荷下改变光发光 (PL) 光谱.
- 在强力下DA弹的平面化导致其PL频谱的低色变化.
- 了解聚合物内部的分子力对于预测材料特性和性能至关重要.
研究的目的:
- 开发和验证DA弹的线性力校准方法,以量化聚合物中的分子力.
- 为了证明这种方法在不同聚合物矩阵中的应用.
- 为在线监测聚合物中的局部分子力提供一个工具.
主要方法:
- 使用了理论计算和实验单轴拉伸试验的组合.
- 开发了一种简单的线性力校准,基于PL波长的机色变化.
- 采用了两种不同的聚合物系统:玻璃状聚烯和弹性聚甲基氧网络.
- 与已知的机械化学反应值相对应的验证的力测量.
主要成果:
- 成功校准了两个不同的DA弹机械染色体,以确定力.
- 在使用PL转移的线性和网络聚合物中的量化平均分子力.
- 在PL转移和机械化学探测器估计的力之间表现出很好的一致性.
- 证实了DA弹在现场力监测中的实用性.
结论:
- DA弹可以可靠地校准,以作为聚合物中的分子力传感器.
- 开发的方法允许在各种聚合物矩阵中准确地在线监测局部分子力.
- 这种技术为了解分子层面的聚合物力学提供了一种新的方法.
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