| No. Sample | Thermomechanical treatment modes | Structure of PAN | Structure of thermally stabilized fiber | ||||
| Temperature, ˚С | Duration of heat treatment | d010, Å | L010, nm | Z, degrees | d, Å | L, nm | |
| Precursor PAN fiber | 5.288 | 13.3 | 3.95 | - | - | ||
| 1 | 200 | 5 minutes | 5.220 | 15.0 | 3.8 | - | - |
| 265 | 10 minutes | 5.261 | 16.7 | 3.4 | - | - | |
| 20 minutes | 5.236 | 16.2 | 3.8 | 3.38 | 1.7 | ||
| 30 minutes | 5.249 | 14.0 | 3.9 | 3.39 | 2.3 | ||