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| Sample | Burning duration (s) | Carbon layer length (mm) | Horizontal combustion rate (mm·s–1) |
|---|---|---|---|
| PVA/CA/HNTs-0 | 30 | 15 | 0.50 |
| PVA/CA/HNTs-2 | 14 | 0.47 | |
| PVA/CA/HNTs-6 | 13 | 0.43 | |
| PVA/CA/HNTs-10 | 10 | 0.33 |
