真空电子技术Issue(2)：38-44,7.DOI:10.16540/j.cnki.cn11-2485/tn.2026.02.07
固化反应对单向碳纤维预浸料介电性能的影响
Effects of Curing Reaction on Dielectric Properties of Unidirectional Carbon Fiber Prepregs
摘要
Abstract
The curing of carbon fiber reinforced polymer(CFRP)via microwave heating has the advantages of energy reservation and consumption reduction,but microwave curing technology still faces the limitation of hard to control on the heating process.A cylindrical cavity perturbation measurement method is utilized to study the effect of curing reaction on the complex dielectric permittivity of unidirectional carbon fiber prepregs in depth.By taking the dynamic DSC scan on the uncured prepreg in the temperature range from-50～300 ℃,the Tg,0 of un-cured prepreg is determined to be-13.8 ℃.The rheological testing indicates that the resin matrix is in sol state at room temperature,and the sol-gel transition occurs after 51 min of curing.The dynamic mechanical analysis testing demonstrates that the resin matrix begins to undergo glass transition after 73 minutes.The dielectric properties anal-ysis indicates that the axial dielectric constant ε'r of the prepreg fluctuates between 120.2 and 127.3 throughout the curing process.The dielectric loss εe″ff maintains at 0.63 in the first 55 minutes of the curing process.It decreases to 0.52 due to the sol-gel transition after curing for 60 minutes,and increases to 1.4 due to the glass transition from 75 to 90 minutes.The εe″ff of the fully cured prepreg finally decreases to 0.72 and remains stable.The study provides data support for quantifying the microwave energy absorption and conversion of CFRP,which is beneficial for im-proving the precise control of CFRP microwave heating.关键词
单向碳纤维预浸料/复介电常数/DSC/流变特性/DMAKey words
Unidirectional carbon fiber prepreg/Complex dielectric permittivity/DSC/Rheological properties/DMA分类
信息技术与安全科学引用本文复制引用
陈楷华,陈静,严妍,郭胜惠,杨黎,周俊文,李鑫培..固化反应对单向碳纤维预浸料介电性能的影响[J].真空电子技术,2026,(2):38-44,7.基金项目
云南省基础研究项目(202401BE070001-021 （）
202501AU070116) （）
