纳米SiO_2界面处理对CE基复合材料静态力学性能的影响

将纳米SiO2先用大分子偶联剂SEA–171处理,再与偶氮二异丁腈发生接枝反应而锚固上偶氮引发剂,并通过热失重和元素分析证明了引发剂在纳米SiO2表面的锚固。利用纳米SiO2对氰酸酯树脂(CE)进行改性,研究了纳米SiO2的含量对CE/纳米SiO2复合材料静态力学性能的影响;分析了纳米SiO2复合材料界面的结构特征,探讨了其作用机理。结果表明,纳米SiO2的加入提高了复合材料的冲击强度和弯曲强度。当M–1的添加量为3%时,复合材料的冲击强度增幅56.4%;弯曲强度增幅为44.2%。当M–2的添加量为4%时,复合材料的冲击强度增幅为89.0%;弯曲强度增幅为53.8%。经过锚固处理后,纳米SiO2颗粒团聚程度减小,在高分子有机相中的分散更均匀。

Effect of Anchoring of Interface Treatment Technology on Quasi-static Mechanical Property of Composite Material

To anchor the azobisisobutyronitrile(AIBN)onto nano-SiO2 particles,the macromolecule coupling agent SEA–171 of AIBN onto nano-SiO2 particles was achieved by grafting onto nano-SiO2 with AIBN.The anchoring of AIBN was confirmed by DSC and element analysis.The influence of the content of the nano-SiO2 particles on the static mechanics performance of nanometer SiO2/cyanate ester resin(CE) composite material were investigated by modifying CE with nano-SiO2 particles.On this basis,We studied the influence of the material interface structure on the static mechanics performance of nanometer SiO2/CE composite material and its mechanism.It showed that the impact strength and flexural strength of the composites materials obviously increased by adding the nano-SiO2 particles(especially M–2)to them.For M–1,when the content of the nano-SiO2 particles reached 3%,the impact strength and flexural strength of the composites materials were improved 56.4% and 44.2% respectively.For M–2,when the content of the nano-SiO2 particles reached 4%,the impact strength and flexural strength of the composites materials were improved 89.0% and 53.8% respectively.The nano-SiO2 particles aggregating gradually decreased,and the nano-SiO2 particles dispersed uniformly and stablely in macromolecular organic solvents after anchoring of AIBN onto the nano-SiO2 particles.