【摘要】 利用偶联剂处理后的纳米 Si O2 粒子改性环氧树脂制备纳米 Si O2 /环氧树脂复合材料。IR分析表明 :纳米 Si O2与环氧树脂形成了复合体 ;热失重、冲击强度、扫描电子显微镜和体积电阻率测试表明 :纳米 Si O2 和普通 Si O2 对环氧树脂有明显的改性作用 ,当 Si O2 /环氧树脂为 4 / 10 0时 ,复合体的热解温度、冲击强度和体积电阻率均达到最大值 ,纳米 Si O2 /环氧树脂的热解温度、冲击强度和体积电阻率分别为 32 3℃ ,89.2 k J· m- 2 和 3.5 6× 10 1 4Ω· cm- 2 ;普通Si O2 /环氧树脂的热解温度、冲击强度和体积电阻率分别为 30 8℃ ,17.13k J·m- 2和 2 .80× 10 1 4Ω·cm- 2。更多还原

【Abstract】 Nano-SiO₂/epoxy resins composites were prepared by modification epoxy resins with nano-SiO₂ treated by coupling agent.Composites of nano-SiO₂/epoxy resins were indicated by IR analysis.It is showed by TGA, impact, SEM and volume resistances analyses that epoxy resins are modified obviously by nano-SiO₂ and ordinary SiO₂, highest values of decomposition temperature, impact intensity and volume resistance of composites are obtained respectively when SiO₂/EP is 4/100, decomposition temperature, impact intensity and volume resistance of nano-SiO₂/epoxy resins are 323℃, 89.2kJ·m^-2 and 3.56×10¹⁴Ω·cm^-2; decomposition temperature, impact intensity and volume resistance of ordinary SiO₂/epoxy resins are 308℃, 17.13kJ·m^-2 and 2.80×10¹⁴Ω·cm^-2 respectively.更多还原