Hydrothermal Synthesis of Lanthanum-Doped MgAl-Layered Double Hydroxide/Graphene Oxide Hybrid and Its Application as Flame Retardant for Thermoplastic Polyurethane

Figure 8

SEM images of char residues of (a) TPU, (b) TPU1, (c) TPU2, and (d) TPU3 after CCT.

(a)

(b)

(c)

(d)