Table 5.
Mechanical properties of polyurea-polyurethane- MWCNTs nanocomposites.
| Sample | MWCNTs Conc. (%) | Young’s Modulus * (MPa) | Maximum Tensile True Stress (σT) (MPa) | Deformation Energy (Tensile Toughness) (J·m−3) |
|---|---|---|---|---|
| PU | 0 | 48.65 ± 1.02 | 33.76 ± 0.42 | 11.31 ± 0.29 |
| PU-NC1 | 0.05 | 70.11 ± 0.98 | 34.48 ± 0.62 | 12.90 ± 0.13 |
| PU-NC2 | 0.1 | 79.22 ± 1.28 | 35.87 ± 0.55 | 13.57 ± 0.21 |
| PU-NC3 | 0.2 | 81.54 ± 0.83 | 40.84 ± 0.42 | 16.53 ± 0.18 |
| PU-NC4 | 0.3 | 43.87 ± 1.44 | 33.91 ± 0.58 | 12.90 ± 0.43 |
* Young’s Modulus was calculated according to the mathematical model described by Xue and Hutchinson [32].