Table 2 Kinetic parameters of the thermal degradation of chitosan
From: Non-isothermal kinetics of thermal degradation of chitosan
 α  |  E (kJ mol–1) |  A (min-1) | –Δ S ≠(J mol–1 K–1) | Δ H ≠, (kJ mol–1) | Δ G ≠, (kJ mol–1) |
|---|---|---|---|---|---|
First stage | |||||
0.25 | 126.0 | 3.34×1011 | 70.8 | 121.9 | 156.6 |
0.35 | 137.6 | 5.32×1012 | 47.8 | 133.5 | 156.9 |
0.45 | 136.2 | 3.92×1012 | 50.3 | 132.1 | 156.8 |
0.55 | 133.6 | 2.30×1012 | 54.7 | 129.5 | 156.3 |
0.65 | 121.5 | 1.60×1011 | 76.9 | 117.4 | 155.1 |
0.75 | 101.0 | 1.78×109 | 114.3 | 96.9 | 153.0 |
Average | 126.0 | 2.01×10 12 | 69.1 | 121.9 | 155.8 |
Second stage | |||||
0.25 | 83.3 | 3.73×104 | 207.6 | 76.9 | 235.9 |
0.35 | 92.3 | 2.36×105 | 192.3 | 86.0 | 233.2 |
0.45 | 97.9 | 6.18×105 | 184.2 | 91.6 | 232.7 |
0.55 | 105.8 | 2.27×106 | 173.4 | 99.5 | 232.3 |
0.65 | 107.3 | 2.70×106 | 172.0 | 100.9 | 232.6 |
0.75 | 108.0 | 2.99×106 | 171.2 | 101.6 | 232.7 |
Average | 99.1 | 1.47×10 6 | 183.4 | 92.7 | 233.3 |