Table 3.
Comparative DSC data of PLA and PLA-magnetite nanocomposites (second DSC heating, 10 °C/min).
| Sample | Tg (°C) |
Tcc1 (°C) |
ΔHcc1 (J g−1) |
Tcc2 (°C) |
ΔHcc2 (J g−1) |
Tm (°C) |
ΔHm (J g−1) |
χc, % |
|---|---|---|---|---|---|---|---|---|
| PLA | 61 | 109 | 24.8 | - | - | 169 | 36.7 | 12.8 |
| PLA-4M | 60 | 106 | 27.3 | - | - | 168 | 39.5 | 13.1 |
| PLA-8M | 59 | 99 | 23.4 | 155 | 1.6 | 168 | 38.3 | 14.3 |
| PLA-16M | 58 | - | - | - | - | 167 | 37.3 | 40.1 |
| PLA-4Ms | 59 | 101 | 26.9 | 151 | 0.5 | 167 | 41.5 | 15.2 |
| PLA-8Ms | 60 | 102 | 27.7 | 151 | 1.1 | 168 | 40.9 | 13.0 |
| PLA-16Ms | 57 | 96 | 17.4 | 152 | 1.8 | 166 | 42.4 | 24.9 |
Abbreviations: glass transition temperature (Tg), cold crystallization temperature (Tcc), enthalpy of cold crystallization (ΔHcc), melting temperature (Tm), melting enthalpy (ΔHm), degree of crystallization (χc,).