Present study investigates the effect of functionalized fumed silica (f-silica) on the thermal; mechanical and thermomechanical properties of amine terminated polybutadiene-co-acrylonitrile rubber (ATBN) modified novolac epoxy resin. All the nanocomposites showed higher thermal stability as compared to the neat novolac epoxy. Maximum –55 ˚C increment in the peak degradation temperature was achieved in the nanocomposite containing 0.1 wt. % f-silica and 10 wt. % ATBN. Glass transition temperature of the nanocomposites was reduced as compared to neat novolac epoxy resin due to incorporation of ATBN. Thermomechanical analysis showed that crosslinking density of the ATBN/novolac epoxy composite was increased as compared to neat novolac epoxy, which was further reduced in the nanocomposites due to hardener capping effect of the f-silica. All the nanocomposites showed higher elongation at break as compared to neat novolac epoxy resin. Maximum –87 and 60% increment in tensile and flexural strengths were achieved in the nanocomposite containing 2 wt % f-silica and 10 wt. % ATBN. Impact strength of the nanocomposites was increased with increasing f-silica content. Preferential conglomeration of the f-silica nanoparticles was observed in the rubber phase which acted as the efficient energy absorption point during the impact testing.

目前的研究调查了功能化气相二氧化硅（f-silica）对热的影响。胺封端的聚丁二烯-共-丙烯腈橡胶（ATBN）改性酚醛清漆环氧树脂的机械和热机械性能。与纯酚醛清漆环氧树脂相比，所有纳米复合材料均显示出更高的热稳定性。在含有0.1 wt。％的纳米复合材料中，峰值降解温度最大增加–55˚C。％f-二氧化硅和10 wt。％ATBN。与纯酚醛清漆环氧树脂相比，由于掺入了ATBN，纳米复合材料的玻璃化转变温度降低了。热力学分析表明，与纯线型酚醛清漆环氧树脂相比，ATBN /线型环氧复合材料的交联密度有所提高，由于f-二氧化硅的固化剂封端效应，纳米复合材料中的交联密度进一步降低。与纯线型酚醛环氧树脂相比，所有纳米复合材料均显示出更高的断裂伸长率。在含有2 wt％的f-二氧化硅和10 wt。％的二氧化硅的纳米复合材料中，抗张强度和抗弯强度分别达到–87和60％的最大增量。％ATBN。纳米复合材料的冲击强度随着f-二氧化硅含量的增加而增加。在橡胶相中观察到了f-二氧化硅纳米颗粒的优先团聚，该相在冲击试验中充当了有效的能量吸收点。