电瓷避雷器Issue(3)：167-172,179,7.DOI:10.16188/j.isa.1003-8337.2024.03.021
不同交联度下复合绝缘子用环氧树脂热力学性能分子动力学模拟
Molecular Dynamics Simulation of Thermo dynamic Properties of Epoxy Resin for Composite Insulator Under Different Crosslinking Degrees
刘会斌 1张欣伟 1王延伟 1刘天奇 1王博 1冯振华 1郑靖泉2
作者信息
- 1. 国网内蒙古东部电力有限公司电力科学研究院,呼和浩特 010000
- 2. 河北工业大学,天津 300132
- 折叠
摘要
Abstract
Composite insulators have been widely used in AC and DC transmission projects in China.However,during operation,cold and heat shock,extreme temperature and mechanical stress will accele-rate their insulation aging,and small defects are easy to appear in the core rod,which becomes the weak link of insulation.Crosslinking degree is one of the important factors affecting the internal crosslinking structure of epoxy resin.The study on the relationship between crosslinking structure and thermodynamic properties of epoxy resin is of great significance to improve its insulation reliability.Therefore,based on the method of molecular dynamics,the bisphenol A epoxy resin model with different crosslinking degrees was constructed,and the effects of different crosslinking degrees on the thermodynamic properties of epoxy resin were studied from the molecular point of view.The results show that with the increase of crosslinking degree of epoxy resin model,its thermal and mechanical properties are obviously improved.From the microscopic point of view,the increase of crosslinking degree improves the cohesive energy den-sity and reduces the ratio of mean square displacement and free volume.The change of structural parame-ters explains the influence of different crosslinking degrees on the thermodynamic properties of epoxy re-sin,providing a theoretical basis for exploring the aging mechanism of composite insulators.关键词
复合绝缘子/双酚A环氧树脂/交联度/分子动力学模拟Key words
composite insulator/bisphenol A epoxy resin/crosslinking degree/molecular dynamics simula-tion引用本文复制引用
刘会斌,张欣伟,王延伟,刘天奇,王博,冯振华,郑靖泉..不同交联度下复合绝缘子用环氧树脂热力学性能分子动力学模拟[J].电瓷避雷器,2024,(3):167-172,179,7.
