As shown in Fig. 1b, the D60/40 exhibits an Izod impact strength of 42.5 kJ/m2, much higher than that of the B60/40, 13.9 kJ/m2. The significant improvement can be also found in the tensile strength.
For the blend ratio of 80/20, the tensile strength is increased by 4 MPa after dynamic vulcanization, whereas it
is increased by 5.7 MPa for 60/40.
The significant improvements in the mechanical properties of the resultant materials indicate that peroxide-induced dynamic vulcanization provides an effective route for improving the mechanical properties of PLA/NR blends, especially the toughness.
Fig. 1. Effects of peroxide induced dynamic vulcanization on the mechanical properties of PLA/NR blends: (a) PLA/NR ¼ 80/20; (b) PLA/NR ¼ 60/40; and Mechanical properties of the dynamically vulcanized PLA/NR blends with various PLA/NR ratios: (c) tensile strength; (d) Izod impact strength; (e) elongation; (f) stress-strain curves.
As shown in Fig. 1b, the D60/40 exhibits an Izod impact strength of 42.5 kJ/m2, much higher than that of the B60/40, 13.9 kJ/m2. The significant improvement can be also found in the tensile strength. For the blend ratio of 80/20, the tensile strength is increased by 4 MPa after dynamic vulcanization, whereas itis increased by 5.7 MPa for 60/40. The significant improvements in the mechanical properties of the resultant materials indicate that peroxide-induced dynamic vulcanization provides an effective route for improving the mechanical properties of PLA/NR blends, especially the toughness.Fig. 1. Effects of peroxide induced dynamic vulcanization on the mechanical properties of PLA/NR blends: (a) PLA/NR ¼ 80/20; (b) PLA/NR ¼ 60/40; and Mechanical properties of the dynamically vulcanized PLA/NR blends with various PLA/NR ratios: (c) tensile strength; (d) Izod impact strength; (e) elongation; (f) stress-strain curves.
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