A new carbazole terminal nanosilica reinforced polybenzoxazine (nSiO₂/PBZ) was synthesized using carbazole terminal benzoxazine monomer (CBZ) and nanosilica through in-situ sol-gel method. The FT-IR spectra were helped to confirm the formation of the hybrid nanocomposites. The PBZ-nSiO₂ hybrids were accounted for their excellent thermal stability and good char yield due to the presence of the inter-cross linked silica networks in PBZ-nSiO₂ hybrids. The high loading level of nanosilica particles into PBZ system elevated the glass transition temperature to a higher percentage than that of neat PBZ system. The hybrids obtained using high weight % of nanosilica (10 wt %) possessed higher T_g than that of hybrids prepared using low weight % nanosilica. The nSiO₂/PBZ hybrids exhibited the higher thermal stability and the resultant higher char yield evidenced and proved from the TGA analysis. Transmission electron microscope and scanning electron microscope supported the morphological features of the homogeneous dispersion of the inorganic nanosilica in the polybenzoxazine matrix.

以咔唑末端苯并恶嗪单体（CBZ）和纳米二氧化硅为原料，通过原位溶胶-凝胶法合成了新型咔唑末端纳米二氧化硅增强聚苯并恶嗪（nSiO ₂ /PBZ）。FT-IR 光谱有助于确认混合纳米复合材料的形成。由于PBZ-nSiO ₂杂化物中存在相互交联的二氧化硅网络，PBZ-nSiO ₂杂化物具有优异的热稳定性和良好的炭产率。纳米二氧化硅颗粒在 PBZ 系统中的高负载水平将玻璃化转变温度提高到比纯 PBZ 系统更高的百分比。使用高重量百分比的纳米二氧化硅 (10 wt %) 获得的杂化物具有更高的T _g与使用低重量百分比纳米二氧化硅制备的杂化物相比。nSiO ₂ /PBZ 杂化物表现出更高的热稳定性和由此产生的更高的炭产率，这从 TGA 分析中得到证实和证明。透射电子显微镜和扫描电子显微镜支持无机纳米二氧化硅在聚苯并恶嗪基质中均匀分散的形态特征。