Table 2. Thermal Properties and Crystallinity of PBS and PBSTMG Copolymers.
| sample | Tm (°C) | Tc (°C) | Tg1 (°C)a | Tg2 (°C)a | ΔHm (J/g) | ΔHc (J/g) | Xc (%)b |
|---|---|---|---|---|---|---|---|
| PBS | 114.1 | 75.7 | –22.9 | 66.9 | 62.3 | 60.5 | |
| PBSTMG-5 | 105.6 | 61.8 | –42.9 | 57.5 | 51.2 | 52.0 | |
| PBSTMG-10 | 101.1 | 58.0 | –56.7 | –26.0 | 50.3 | 49.7 | 45.5 |
| PBSTMG-15 | 82.1 | 47.2 | –63.8 | –26.7 | 24.6 | 27.7 | 25.1 |
| PBSTMG-20 | 78.8 | 47.1 | –67.4 | –31.4 | 20.0 | 16.1 | 14.6 |
a
The glass-transition temperature (Tg) was adopted from the tan δ peak measured by dynamic thermal analysis.
b
The degree of crystallinity (Xc) was calculated from the DSC results.