736474.fig.006a
(a)
736474.fig.006b
(b)
736474.fig.006c
(c)
Figure 6: SEM images of the fracture surfaces of kenaf fiber/PP composites. (a) PP composites reinforced with untreated fibers; (b) PP composites reinforced with INI-treated fibers (INI treatment conditions were 100°C, Na2CO3 : CaCl2 = 1 : 2, mol : mol), and (c) PP composites reinforced with INI-treated fibers (INI treatment conditions were 160°C, Na2CO3 : CaCl2 = 1 : 1, mol : mol).