Table 2.
Summary of the mechanical properties of the green composites made of polylactide (PLA), poly(ε-caprolactone) (PCL), walnut shell flour (WSF), and maleinized linseed oil (MLO) in terms of: tensile modulus (E), maximum tensile strength (σmax), elongation at break (εb), Shore D hardness, and impact strength.
| Piece | E (MPa) | σmax (MPa) | εb (%) | Shore D Hardness | Impact Strength (kJ/m2) |
|---|---|---|---|---|---|
| PLA | 1101.1 ± 50.1 a | 61.1 ± 0.8 a | 8.9 ± 0.2 a | 81.4 ± 1.7 a | 24.3 ± 2.1 a |
| PLA/PCL | 943.3 ± 24.2 b | 50.8 ± 0.4 b | 10.4 ± 1.4 a | 76.4 ± 2.1 a | 26.1 ± 2.3 a |
| PLA/PCL/10WSF + MLO | 832.9 ± 25.5 c | 25.4 ± 0.3 c | 18.7 ± 1.7 b | 75.0 ± 1.2 b | 24.5 ± 2.8 a |
| PLA/PCL/20WSF + MLO | 787.7 ± 35.3 d | 21.8 ± 1.1 c | 16.1 ± 2.2 b | 74.6 ± 1.8 b | 22.6 ± 1.9 a |
| PLA/PCL/30WSF + MLO | 723.2 ± 29.6 d | 13.4 ± 1.0 d | 3.1 ± 0.7 c | 75.4 ± 0.5 b | 13.1 ± 1.4 b |
| PLA/PCL/40WSF + MLO | 714.5 ± 49.5 d | 10.4 ± 1.3 d | 2.1 ± 0.5 c | 75.9 ± 0.6 b | 9.4 ± 1.6 c |
| PLA/PCL/40WSF | 604.8 ± 52.9 d | 8.9 ± 2.2 d | 1.5 ± 0.1 c | 77.8 ± 1.3 a | 4.9 ± 0.9 d |
a–d Different letters in the same column indicate a significant difference among the samples (p < 0.05).