Synthesis and Physicochemical Behaviour of Polyurethane-Multiwalled Carbon Nanotubes Nanocomposites Based on Renewable Castor Oil Polyols

Figure 10

Schematic model describing the path of the diffusing N₂ gas through the COPU-MWCNTs nanocomposite. () is the actual distance travelled in the absence of fillers and () is tortuous path length in the presence of fillers.