Table 3 DSC analysis of PHBHHx with various 3HHx composition
3HHx composition (mol%) | First heating process | Cooling process | Second heating process | |||||
|---|---|---|---|---|---|---|---|---|
T m (°C) | ΔH m (J/g) | Xc (%) | T g (°C) | T c (°C) | ΔH c (J/g) | T cc (°C) | ΔH cc (J/g) | |
0 (PHB)a | 175.1 | 103.0 | 70.5 | 0.4 | 77.4 | 80.2 | – | – |
2.7 | 150.8 | 72.9 | 49.9 | −2.3 | 50.2 | 25.0 | 50.3 | 21.7 |
5.2 | 142.0 | 70.8 | 48.5 | −2.9 | 41.0 | 3.6 | 58.8 | 47.1 |
5.9 | 138.9 | 69.5 | 47.6 | −2.4 | – | – | 68.2 | 43.3 |
7.1 | 133.5 | 66.3 | 45.4 | −2.1 | – | – | 74.5 | 27.2 |
7.9 | 131.1 | 67.5 | 46.2 | −2.2 | – | – | 76.7 | 20.2 |
9.1 | 116.4 | 65.9 | 45.1 | −3.4 | – | – | 77.0 | 12.2 |
10.0 | 114.7 | 60.4 | 41.4 | −3.6 | – | – | 78.9 | 1.9 |
10.8 | 113.5 | 55.8 | 38.2 | −4.7 | – | – | 79.9 | 1.2 |