Catalyzing Benzoxazine Polymerization with Titanium-Containing POSS to Reduce the Curing Temperature and Improve Thermal Stability

Trisilanolphenyl-polyhedral oligomeric silsesquioxane titanium (Ti-Ph-POSS) was synthesized through the corner-capping reaction, and Ti-Ph-POSS dispersed in benzoxazine (BZ) to prepare Ti-Ph-POSS/PBZ composite materials. could catalyze ring-opening polymerization (ROP) of BZ reduce curing temperature benzoxazine. In addition, Ti immobilized on cage form covalent bonds with N or O atoms polybenzoxazine, improving thermal stability PBZ. The catalytic activity Ti-Ph-POSS/BZ mixtures assessed identified 1H nuclear magnetic resonance (1H-NMR) Fourier-transform infrared (FTIR) analyses, while thermogravimetric analysis (TGA) dynamic mechanical (DMA) were used determine properties composite. It found that PBZ exhibited a higher glass transition (Tg) better when added. behavior showed initial (Ti) peak (Tp) temperatures sharply decreased as content heating rate increased. kinetics these systems analyzed using Kissinger method, morphology determined via scanning electron microscopy (SEM). particles well distributed composites. When exceeded 2 wt%, several not react only within matrix, resulting aggregation molecules.