复合材料科学与工程Issue(8)：66-73,8.DOI:10.19936/j.cnki.2096-8000.20250828.008
环氧树脂固化物吸湿行为及其对介电性能的影响
Moisture absorption behavior of epoxy resin cured products and its influence on the dielectric properties
张杜鹃 1李亚锋 1礼嵩明 1鹿海军1
作者信息
- 1. 中国航空制造技术研究院 复合材料技术中心,北京 101300
- 折叠
摘要
Abstract
To investigate the moisture absorption behavior of epoxy resin and the changes in its dielectric prop-erties post-absorption,the study developed epoxy resins with various structures by varying the type of curing agent.The moisture absorption rate of the cured materials was monitored under 70℃water immersion conditions,and the dielectric properties were tracked.The results indicated that the moisture absorption process followed the Fick diffu-sion model,the type of curing agent affects the polarity and free volume of the cured material,the polarity deter-mines the equilibrium moisture absorption rate of the resin,and the polarity and free volume jointly determine the diffusion coefficient of water molecules.The greater the polarity,the higher the moisture absorption rate of the resin equilibrium,and the easier it is for the polar groups to form hydrogen bonds with water molecules and hinder the movement of water molecules.The larger the free volume,the more diffusion channels the water molecule has,and the faster the diffusion.The dielectric properties of the cured matter are different with different curing agents,and the dielectric constant and loss tangent change linearly with the moisture absorption rate and are independent of the type of curing agent.Based on this research,a model was developed to predict the dielectric properties of epoxy res-ins as a function of their moisture absorption rates,with a deviation of no more than 10%between model predictions and actual measurements.关键词
环氧树脂/固化剂/吸湿率/介电常数/损耗角正切/复合材料Key words
epoxy resin/curing agent/moisture absorption rate/dielectric constant/loss tangent/composites分类
通用工业技术引用本文复制引用
张杜鹃,李亚锋,礼嵩明,鹿海军..环氧树脂固化物吸湿行为及其对介电性能的影响[J].复合材料科学与工程,2025,(8):66-73,8.
