Figure 6.

Schematic illustration of the superior flame retardancy of the few-layer BP in a structure (a) and a thermal-property coupling (b). (a) FP: flammable polymer, OPs: organic P-FRs. (b) Yellow regions represent the generation and volatilization temperature ranges of phosphorus oxide in FLBP and RPnp, and the red highlighted regions represented the regions of the combustion enthalpy peaks; the blue region represents the volatilization temperature range of TPP, where the green highlighted area represents the region of the volatilization enthalpy peak; red color in cellulose represents its decomposition to char temperature range, and different polymer decomposition start temperatures were noted. The decomposition start temperatures of polyurethane (PU), polyvinyl alcohol (PVA), polylactic acid (PLA), and epoxy resin (EP) were read from references [32,34,38,40].