Table 6.
Molecular weights of P(3HO-co-3H5DD) samples produced in batch cultivation
| Sample | PHA composition (mol %) | Molecular weight | |||
|---|---|---|---|---|---|
| 3HO | 3H5DD | Mn | Mw | Mw/Mn | |
| Acinetobacter sp. ASC1 | 1 | 99 | 4.7 × 104 | 8.8 × 104 | 1.9 |
| Pseudomonas sp. ASC2 | 5 | 95 | 3.6 × 104 | 6.5 × 104 | 1.8 |
| Enterobacter sp. ASC3 | 10 | 90 | 8.9 × 104 | 14.5 × 104 | 1.6 |
| Bacillus sp. ASC4 | 0 | 100 | 6.6 × 104 | 14.1 × 104 | 2.2 |
M n number average molecular weight, M w weight average molecular weight, M w /M n the polydispersity index, used as a measure of the broadness of a molecular weight distribution of a polymer. The larger the polydispersity index, the broader the molecular weight. Step polymerization reactions typically yield Mw/Mn values of around 2.0