Research Article

Preparation and Structural Properties of Free Films from Rapeseed Oil-Based Rigid Polyurethane-Montmorillonite Nanocomposites

Figure 5

Density (a) of PU and PU/OMMT nanocomposites as a function of the OMMT weight content : 1—experimental data, 2—calculation by the additivity equation (2) and 3—apparent density (b) by (3).
834595.fig.005a
(a)
834595.fig.005b
(b)