Table 1.
DSC results for PBS, PBAT and their blends during the cooling from melt. The values of crystallization enthalpy in parentheses are normalized with respect to the weight fraction of the polymer in the blends.
| Sample | T0.1% (°C) | T99% (°C) | Tc PBAT (°C) | Tc PBS (°C) | ΔHc PBAT (J/g) | ΔHc PBS (J/g) |
|---|---|---|---|---|---|---|
| PBAT | 91.4 | 56.8 | 67.4 | - | 21.0 | - |
| PBS25-PBAT75- | 99.3 | −38 | 66.6 | 40.0 (Tc1), 21.3 (Tc2) | 17.5 (23.3) | 15.6 (62.4) |
| PBS50/PBAT50 | 91.2 | 58.3 | 69.2 | 83.3 | 9.5 (19) | 33.4 (66.8) |
| PBS75/PBAT25 | 91.4 | 62.4 | N.D. | 83.3 | 6.1 (24.4) | 52.5 (70) |
| PBS | 91.8 | 75.2 | - | 84.3 | - | 72.3 |
T0.1% and T99.9% are the temperatures required to achieve 0.1% and 99.9% crystalline fraction, Tc is the crystallization peak temperature and ΔHc is the crystallization enthalpy.