Table 5.
Summary of the mechanical properties from tensile, flexural, and hardness tests of neat PHBH and PCL and PHBH/PCL blends with different PCL wt %. σt and σf represent the tensile and flexural strength, respectively. Et and Ef are the respective values for the tensile and flexural modulus.
| Code | σt (MPa) | Et (MPa) | εb(%) | σf (MPa) | Ef (MPa) | Shore D Hardness |
|---|---|---|---|---|---|---|
| 100PHBH-0PCL | 16.0 ± 0.9 | 1022 ± 412 | 13.9 ± 1.3 | 29.5 ± 0.6 | 1029 ± 31 | 61.0 ± 0.8 |
| 90PHBH-10PCL | 14.4 ± 0.9 | 966 ± 22 | 19.4 ± 0.8 | 30.2 ± 1.7 | 966 ± 36 | 59.0 ± 0.8 |
| 80PHBH-20PCL | 13.4 ± 0.7 | 837 ± 29 | 67.9 ± 4.1 | 29.3 ± 1.5 | 946 ± 47 | 58.4 ± 1.1 |
| 70PHBH-30PCL | 13.3 ± 1.2 | 817 ± 29 | 308.3 ± 3.6 | 29.2 ± 1.0 | 813 ± 20 | 58.3 ± 0.6 |
| 60PHBH-40PCL | 14.0 ± 0.5 | 722 ± 52 | 461.0 ± 4.1 | 28.3 ± 1.1 | 802 ± 64 | 58.0 ± 0.1 |
| 0PHBH-100PCL | 12.2 ± 0.9 | 386 ± 22 | No break | 22.3 ± 0.3 | 354 ± 26 | 55.0 ± 2.0 |