| Stage | Sample | Range of temperature/β | Tmax/β | Mass/% | Derivative mass/(%βminβ1) |
| First stage | PVC | 220.0~370.0 | 294.5 | 82.69 | 11.01 |
| composites | 200.0~350.0 | 295.0 | 61.23 | 0.81 | |
| Second stag | PVC | 400.0~550.0 | 457.0 | 30.00 | 3.55 |
| composites | 350.0~550.0 | 447.8 | 25.76 | 0.35 |