Abstract
Carbon nanotubes (CNTs) were covalently functionalized by a four components polysilicone (PMDA) to obtain novel, flame-retardant, polysilicone-functionalized carbon nanotubes (CNTs-PMDA). The chemical structure and thermal stability of the CNTs-PMDA were characterized and measured. Then, epoxy resin (EP)/CNTs-PMDA and EP/CNTs nanocomposites were prepared by a solution method, and thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and cone calorimetry were used to evaluate the thermal stability, dispersion state, and flame retardancy of the nanocomposites, respectively. The results showed that the thermal stability of the EP/CNTs-PMDA was better than that of the EP/CNTs, with a higher char yield, and the CNTs-PMDA were dispersed well in the EP matrix. Furthermore, the CNTs-PMDA could improve the flame retardancy of the EP nanocomposites with 2 wt% loading due to the synergistic flame-retardant effect between the PMDA and CNTs, having better flame retardancy than either one alone.
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