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Bismaleimide(BMI) resin/silsesquioxane or titania nanocomposites weresynthesized from bismaleimide resin and SiO3/2 or TiO2 via the sol-gel processof N-{\gamma}-triethoxylsilylpropyl-maleamic acid (TESPMA) ortetrabutyltitanate (Ti(OnBu)4, TBT), respectively, in the presence of theAP-BMI prepolymers. These nanocomposite materials were characterized by FT-IR,FE-SEM, TGA and DMA. It was found that the nano-scale SiO3/2 or TiO2 particleswere formed in the AP-BMI resin matrix and the average original particle sizeof the dispersed phase in the nanocomposites was less than 100nm, but theparticle aggregates with bigger size existed. Obvious improvements of Tg andthe heat resistance of the AP-BMI resin were achieved by introduction of thenano-sized SiO3/2 inorganic phase, and the modulus at high temperatures wasimproved too. The incorporation of nano-scale TiO2 particles into the AP-BMIresin improved the Tg of the polymer, but lowered the thermal resistance of thematerial, and improved the modulus of the material at lower temperatures, butlowered the modulus at higher temperatures.

Novel Bismaleimide Resin/Silsesquioxane and Titania Nanocomposites by  the Sol-Gel Process: the Preparation, Morphology, Thermal and  Thermo-mechanical Properties