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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(nano-SiO2)=3%时,nano-SiO2/PPO/BCE复合材料的冲击强度(19.6 kJ/m2)和弯曲强度(116.8 MPa)分别比纯PPO/BCE体系提高了33.3%和3.85%,其吸水率与纯PPO/BCE体系相当,介电常数高于纯PPO/BCE体系,但介电损耗因子低于纯PPO/BCE体系。
BCE (bisphenol A type cyanate) modified with polyphenylene ether resin (PPO) was used as a matrix resin of the composite material, and a nano-SiO 2 treated with a silane coupling agent (KH-560) Modifier to prepare nano-SiO2 / PPO / BCE composites. The results showed that the proper amount of nano-SiO2 could improve the toughness and strength of PPO / BCE system and improve the dielectric and hygroscopic properties. When nano-SiO2 = 3%, nano-SiO2 / PPO / The impact strength (19.6 kJ / m2) and flexural strength (116.8 MPa) of BCE composites were 33.3% and 3.85% higher than those of pure PPO / BCE respectively. The water absorption of BCE composites was comparable to pure PPO / Pure PPO / BCE system, but the dielectric loss factor is lower than the pure PPO / BCE system.