纳米Al2O3/聚醚砜-环氧树脂复合材料的介电性能及热稳定性能

摘要

The nano-Al2O3/polyether sulfone-epoxy resin (EP/5PES/1Al2O3) composites were fabricated and the effects of different nano-Al2O3 and PES addition on the mechanical,dielectric and thermal stability properties of composite were also investigated.The results shows that the tensile strength,elongation at break and impact strength of EP/5PES/1Al2O3 composite arrive at 58 MPa,13％ and 16.2 kJ/m2,respectively,which increase by 61.1％,20.3％ and 8.0％ compared to the pure epoxy resin.Additionally,the EP/5PES/1 Al2O3 composite show higher dielectric constant and dielectric loss of 7.6 and 0.016 (100 H z) compared with the pure epoxy resin.The thermogravimetric analysis (TG) results shows that the thermal stability of EP/5PES/1Al2O3 composites has been improved and its initial decomposition temperature is improved to 358 ℃,which is 14 ℃ higher than that of the pure epoxy resin,indicating a great improvement to thermal stability of composites.%本实验制备了纳米Al2O3/聚醚砜-环氧树脂复合材料,考察了不同纳米氧化铝和聚醚砜的用量对复合体系力学和介电性能的影响,并对其热稳定性能进行了研究.结果表明:当添加1 phr纳米氧化铝(Nano-Al2O3)和5 phr聚醚砜(PES)时,三元复合材料EP/5PES/1Al2O3的拉伸强度提高到58 MPa,断裂伸长率达到13％,冲击强度达到16.2 kJ/m2,相比纯环氧树脂分别提高了61.1％、20.3％和8.0％.而且在100 Hz的室温测试条件下,EP/5PES/1Al2O3材料的介电常数和介电损耗分别达到7.6和0.016,较纯环氧树脂均有一定幅度的增加.热重分析(TG)结果表明,EP/5 PES/1 Al2O3复合材料的初始分解温度为358℃,比纯环氧树脂提高了14℃,说明热稳定性有较大幅度的提高.