A novel benzoxazine monomer contained hyperbranched polysiloxane structure (HBPSi-BOZ) was synthesized via a solvent process based on the polyformaldehyde, aniline, and a new hyperbranched polysiloxane with terminal amino groups (HBPSi-NH2). The HBPSi-BOZ was then used as modified phase to blend with bismaleimides (BMIs) resin, and a polymer alloy HBPSi-BOZ/BMI was successfully prepared. The thermal resistant properties, mechanical properties, and tribological properties of HBPSi-BOZ/BMI resins with different contents of HBPSi-BOZ prepared were researched to get an optimal ratio. The thermogravimetric analysis was also carried out to study the polymerization process and stability of HBPSi-BOZ/BMI resins. The results showed that as the thermal resistance increased, the wear resistance and mechanical properties of HBPSi-BOZ/BMI resins were also enhanced.

A new well-defined amphiphilic St-AN-(KH-570) block macromolecular coupling agent copolymers was successfully synthesized via free radical polymerization with styrene (St), acrylonitrile (AN) and γ-methacryloxypropyl trimethoxy silane (KH-570) in dimethylbenzene. The compositions of copolymers were confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance. Thermal analysis by differential scanning calorimetry indicated that glass transition temperature (Tg) of macromolecular coupling agent is much lower than polystyrene and polyacrylonitrile. The synthesis possessed the number average molecular weights (Mn) of 1.05 × 10 4 by gel permeation chromatography with broad polydispersity index value of 2.48.