突出了脆弱性和合作性的体积贡献之间的相互依赖性,用于聚合物细分松
Jules Trubert1, Liubov Matkovska1, Allisson Saiter-Fourcin1
1Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Normandie Univ, GPM UMR 6634, F-76000 Rouen, France.
The Journal of chemical physics
|January 30, 2024
概括
这项研究通过分析热量和体积贡献,阐明了玻璃成型液体中同位体脆弱性和合作重排区域 (CRR) 大小之间的联系. 它建立了CRR体积和激活体积之间的相关性,突出了分子相互作用的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物物理 聚合物物理
- 物理化学 物理化学
背景情况:
- 了解形成玻璃的液体需要特征结构放松.
- 同位体脆弱性和合作重排区域 (CRR) 大小是关键参数.
- 这些参数与分子相互作用之间的关系仍然很复杂.
研究的目的:
- 阐明在无形热塑性聚合物中等离体脆弱性和CRR大小之间的联系.
- 研究体积和热量对结构松的作用.
- 建立化学结构,压力/温度效应和分子运动之间的联系.
主要方法:
- 在不同压力条件下进行宽带介电谱学.
- 对结构松的体积和热贡献的测量.
- 使用扩展的Donth方法计算CRR数量.
主要成果:
- 这项研究澄清了同位体脆弱性和CRR大小之间的联系.
- 在激活量和CRR量之间发现了强烈的相关性.
- 在压力下,分子间和分子内相互作用显著影响等离子体脆弱性的贡献.
结论:
- 这项研究提供了更清晰的了解玻璃形成液体中的分子流动性.
- 它证明了体积和热因素在等离子体脆弱性中的重要性.
- 这些发现突出了分子相互作用在不同条件下对材料特性的影响.
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