Effect of Sepiolite-Loaded Fe₂O₃ on Flame Retardancy of Waterborne Polyurethane

Figure 4

TEM of samples: (a) Sep, (b, c) Sep@Fe₂O₃, (d) WPU/Sep, (e) WPU/Fe₂O₃, and (f) WPU/Sep@Fe₂O₃.

(a)

(b)

(c)

(d)

(e)

(f)