Development of Flexible Polyurethane Nanostructured Biocomposite Foams Derived from Palm Olein-Based Polyol

Figure 5

Schematic diagram for the reactions of isocyanates with (1) polyol, (2) water, (3) amine, (4) urethane, and (5) disubstituted urea in the synthesis of polyurethane. Source: Ionescu [44].