Table 3.
Avrami analysis for nonisothermal crystallization and half-time of crystallization for PBT and PBT-co-PTMEG copolymers at different PTMEG contents.
| Sample | Ø | n | k | t½ | G |
|---|---|---|---|---|---|
| (°C min−1) | - | (min−n) | (min) | (min−1) | |
| PBT | 2 | 5.2 | 1.48 × 10−4 | 5.09 | 0.196 |
| 5 | 5.3 | 3.58 × 10−3 | 2.69 | 0.372 | |
| 10 | 5.1 | 4.91 × 10−2 | 1.67 | 0.599 | |
| 20 | 5.2 | 4.57 × 10−1 | 1.08 | 0.926 | |
| PBT-co-PTMEG-10 | 2 | 4.7 | 1.21 × 10−4 | 6.35 | 0.157 |
| 5 | 4.7 | 2.32 × 10−3 | 3.33 | 0.300 | |
| 10 | 4.8 | 2.26 × 10−2 | 2.04 | 0.490 | |
| 20 | 5.2 | 4.57 × 10−1 | 1.35 | 0.741 | |
| PBT-co-PTMEG-20 | 2 | 4.5 | 2.00 × 10−4 | 6.23 | 0.161 |
| 5 | 4.6 | 1.99 × 10−3 | 3.54 | 0.282 | |
| 10 | 5.2 | 7.30 × 10−3 | 2.41 | 0.415 | |
| 20 | 5.7 | 4.47 × 10−2 | 1.61 | 0.621 | |
| PBT-co-PTMEG-30 | 2 | 5.3 | 1.05 × 10−5 | 8.00 | 0.125 |
| 5 | 5.6 | 2.37 × 10−4 | 4.21 | 0.238 | |
| 10 | 5.6 | 8.66 × 10−3 | 3.52 | 0.284 | |
| 20 | 5.9 | 2.71 × 10−2 | 1.74 | 0.575 | |
| PBT-co-PTMEG-40 | 2 | 5.9 | 2.33 × 10−6 | 8.54 | 0.117 |
| 5 | 7.0 | 4.37 × 10−6 | 5.55 | 0.180 | |
| 10 | 7.2 | 5.71 × 10−5 | 3.68 | 0.272 | |
| 20 | 7.9 | 3.30 × 10−4 | 2.62 | 0.382 |