摘要
研究了奇士橡胶增韧剂增韧的环氧树脂的介电性能与温度和频率变化的关系 ,并与未增韧的纯环氧树脂的情况作了对比分析 ,橡胶增韧环氧树脂介电性能的改变来自于环氧树脂固化过程中橡胶分散相的形成 ,进而导致界面松弛极化。在交变电场作用下 ,载流子在橡胶相的两端之间运动 ,其行为等效于偶极子 ,该过程可以
Dielectric properties of 40 percent QR toughening-agent toughened anhydride-curd epoxy resins (EP) and pure anhydride-cured EP were measured. The relationships between the relative permittivity and the dielectric loss of cured EP with temperature and frequency were also studied and also compared with those of 40 percent QR toughening-agent toughened anhydride-curd epoxy resins. The interfacial polarization process could be described by the MWS model. It is found that the change of dielectric properties of rubber-toughened epoxy resins is owing to the phase separation process taking place during the cure process.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第4期6-10,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金 (5 97770 15 )
