Table 1.
Summary of thermal properties, molecular weight, and crystallinity of PHA powder and microbeads.
| Sample | DSC1 | GPC2 | WAXD | ||||
|---|---|---|---|---|---|---|---|
| Tg (°C) | Tc (°C) | Tm (°C) | Mw × 104 | Mw/Mn | Crystallinity (%) | ||
| P(3HB) | Powder | 4 | 62 | 171 | 60 | 1.97 | |
| Microbeads | 22 | 2.30 | 65 | ||||
| PHBV | Powder | 2 | 77 | 147,157 | 59 | 2.81 | |
| Microbeads | 32 | 2.17 | 64 | ||||
| PHBH | Powder | 1 | – | 138 | 29 | 2.12 | |
| Microbeads | 26 | 2.25 | 52 | ||||
| PHB4HB | Powder | − 6 | 79 | 160 | 4.3 | 3.11 | |
| Microbeads | 4.0 | 2.80 | 50 | ||||
1Tm was determined from the first heating run, Tc from cooling curve and Tg from the second heating run.
2Molecular weight was determined after dissolving the samples in CHCl3.