Table 2.
Peak temperature(Tp)and enthalpy variation(∆Hc) of PS and PO with different cooling rate.
| Sample | Dc (°C/min) | Peak I | Peak II | ||
|---|---|---|---|---|---|
| Tp (°C) | △Hc (J/g) | Tp (°C) | ∆Hc (J/g) | ||
| PS | 1 | 22.04 ± 0.25 | 9.74 ± 0.65 | 2.42 ± 0.11 | 13.78 ± 0.23 |
| 5 | 20.62 ± 0.44 | 15.76 ± 0.42 | 2.08 ± 0.08 | 21.93 ± 0.37 | |
| 10 | 19.93 ± 0.27 | 16.20 ± 0.12 | 1.85 ± 0.16 | 23.59 ± 0.35 | |
| 15 | 19.48 ± 0.11 | 16.18 ± 0.33 | 1.28 ± 0.04 | 24.93 ± 0.28 | |
| 20 | 19.02 ± 0.21 | 17.02 ± 0.35 | 0.97 ± 0.07 | 25.30 ± 0.19 | |
| PO | 1 | 16.97 ± 0.28 | 4.78 ± 0.19 | 2.08 ± 0.05 | 11.47 ± 0.25 |
| 5 | 14.36 ± 0.35 | 8.51 ± 0.32 | 1.39 ± 0.11 | 19.12 ± 0.32 | |
| 10 | 13.56 ± 0.24 | 8.53 ± 0.28 | 0.37 ± 0.04 | 19.73 ± 0.19 | |
| 15 | 12.54 ± 0.37 | 8.26 ± 0.15 | −0.31 ± 0.03 | 21.68 ± 0.27 | |
| 20 | 11.86 ± 0.14 | 7.98 ± 0.22 | −1.22 ± 0.10 | 24.26 ± 0.65 | |