In this paper, silica nanoparticles with covalently grafted polymer chains were incorporated into bisphenol A dicyanate ester （BADCy） to prepare composites, which resulted in improvements in the mechanical and therm...In this paper, silica nanoparticles with covalently grafted polymer chains were incorporated into bisphenol A dicyanate ester （BADCy） to prepare composites, which resulted in improvements in the mechanical and thermal properties. Fourier-transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM） and thermogravimetric analysis （TGA） were employed to examine the surface functionalization of silica nanoparticles. The effects of functionalized SiO2 （F-SiO2） on the curing reactivity, mechanical and thermal properties of BADCy resin were investigated systematically. The curing reaction of the system was facilitated with the addition of F-SiO2. Meanwhile, compared with the neat resin, the incorporation of appropriate content of modified F-SiO2 can enhance the mechanical properties including impact, flexural strengths and fracture toughness KIC of BADCy resin. In addition, the thermal stability of BADCy/F-SiO2 nanoeomposites is also superior to that of pure BADCy resin.展开更多
文摘In this paper, silica nanoparticles with covalently grafted polymer chains were incorporated into bisphenol A dicyanate ester （BADCy） to prepare composites, which resulted in improvements in the mechanical and thermal properties. Fourier-transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM） and thermogravimetric analysis （TGA） were employed to examine the surface functionalization of silica nanoparticles. The effects of functionalized SiO2 （F-SiO2） on the curing reactivity, mechanical and thermal properties of BADCy resin were investigated systematically. The curing reaction of the system was facilitated with the addition of F-SiO2. Meanwhile, compared with the neat resin, the incorporation of appropriate content of modified F-SiO2 can enhance the mechanical properties including impact, flexural strengths and fracture toughness KIC of BADCy resin. In addition, the thermal stability of BADCy/F-SiO2 nanoeomposites is also superior to that of pure BADCy resin.
