纳米SiO2对聚苯醚树脂/氰酸酯复合材料性能的影响

以聚苯醚树脂(PPO)改性BCE(双酚A型氰酸酯)作为复合材料的基体树脂,以硅烷偶联剂(KH-560)处理过的纳米二氧化硅(nano-SiO2)作为改性剂,制备出nano-SiO2/PPO/BCE复合材料.结果表明:适量的nano-SiO2既可同时提高PPO/BCE体系的韧性和强度,又可改善其介电性能和吸湿性能;当w(...

Influences of nano-Si02 on property of PPO/BCE composites

With BCE(bisphenol A cyanate ester) modified by polyphenylene oxide resin(PPO) as matrix resin of composite,nano-SiO2 filler treated by silane coupler(KH-560) as modifier,so a nano-SiO2/PPO/BCE composite was prepared.The results showed that the toughness and strength can be synchronously enhanced,and the dielectric property and moisture absorption can also be improved for PPO/BCE system when nano-SiO2 content was appropriate.The impact strength(19.6 kJ/m2) or flexural strength(116.8 MPa) of nano-SiO2/PPO/BCE composite were 33.3% or 3.85% more than those of pure PPO/BCE system,but the water absorptions between nano-SiO2/PPO/BCE composite and pure PPO/BCE system were similar,and the dielectric constant of nano-SiO2/PPO/BCE composite was more than that of pure PPO/BCE system,but the dielectric loss factor of nano-SiO2/PPO/BCE composite was less than that of pure PPO/BCE system when mass fraction of nano-SiO2 was 3%.