Table 4.
Thermogravimetric analysis (TGA) properties of Pebax®2533 films at T0 and after 3, 4.5, and 6 h of photo-oxidative degradation.
| Exposure Time (h) | T (Δm = 5%) a (°C) | T (Δm = 50%) b (°C) | Rc (%) |
|---|---|---|---|
| PEBAX 2533 ethanol | |||
| T0 | 224.9 | 379.7 | 0.15 |
| 3 | 213.4 | 377.4 | 0.10 |
| 4.5 | 210.3 | 381.2 | 0.10 |
| 6 | 192.1 | 362.9 | 0.11 |
| PEBAX 2533 i-propanol | |||
| T0 | 224.1 | 350.7 | 0.01 |
| 3 | 198.3 | 289.5 | 0.13 |
| 4.5 | 200.2 | 353.0 | 0.04 |
| 6 | 193.1 | 274.0 | 0.01 |
| PEBAX 2533 1-butanol | |||
| T0 | 208.4 | 356.1 | 0.15 |
| 3 | 210.2 | 372.8 | 0.17 |
| 4.5 | 199.7 | 340.0 | 0.17 |
| 6 | 156.8 | 272.9 | 0.10 |
| PEBAX 2533 HFIP | |||
| T0 | 208.4 | 372.8 | 0.01 |
| 3 | 200.5 | 359.9 | 0.01 |
| 4.5 | 189.0 | 278.5 | 0.11 |
| 6 | 189.2 | 293.5 | 0.48 |
| PEBAX 2533 Hot Press | |||
| T0 | 199.3 | 286,9 | 0.10 |
| 3 | 199.2 | 247.6 | 0.22 |
| 4.5 | 198.1 | 256.1 | 0.01 |
| 6 | 174.5 | 233.3 | 0.12 |
a Onset temperature for decomposition (5% loss of initial weight). b Decomposition temperature at 50% loss of initial weight. c Weight residue (%) at 600 °C.