Table 2.
The temperatures of melting (Tm), crystallization (Tcryst), the heat of fusion (ΔHm), the degree of crystallinity (χc) of PHBV and PCL in mixtures (1:1 and 1:2) and in composites with CNCs.
| Sample |
Tm PCL, °C |
Tm1 PHBV, °C |
Tm2 PHBV, °C |
Tcryst PCL, °C |
Tcryst PHBV, °C |
ΔHm PCL, J g−1 |
ΔHm PHBV, J g−1 |
χc PCL, % | χc PHBV, % |
|---|---|---|---|---|---|---|---|---|---|
| PHBV | - | 145.7 | 156.5 | - | 88.6 | - | 46.5 | - | 31.7 |
| PCL | 55.6 | - | - | 24.1 | - | 76.0 | - | 48.4 | - |
| PHBV/PCL (1:1) | 54.3 | 144.0 | 155.8 | 29.2 | 84.9 | 20.9 | 39.7 | 26.6 | 54.1 |
| PHBV/PCL (1:1)/CNC(PVP)–5 | 54.9 | 145.3 | 156.9 | 28.2 | 87.6 | 15.8 | 28.5 | 21.2 | 40.9 |
| PHBV/PCL (1:1)/CNC(PVP)–10 | 55.3 | 145.3 | 156.9 | 30.0 | 86.5 | 21.5 | 18.9 | 30.4 | 28.6 |
| PHBV/PCL (1:1)/CNC(PVP)–15 | 55.1 | 144.3 | 156.3 | 31.4 | 84.4 | 22.3 | 22.2 | 33.4 | 35.6 |
| PHBV/PCL (1:1)/CNC(PAM)–5 | 55.6 | 144.5 | 156.7 | 31.4 | 82.8 | 18.0 | 18.1 | 24.1 | 26.0 |
| PHBV/PCL (1:1)/CNC(PAM)–10 | 55.1 | 143.9 | 156.3 | 32.0 | 81.8 | 20.8 | 24.6 | 29.4 | 37.3 |
| PHBV/PCL (1:1)/CNC(PAM)–15 | 54.7 | 143.6 | 155.8 | 31.9 | 84.7 | 23.2 | 22.6 | 34.8 | 36.3 |
| PHBV/PCL (1:2) | 55.7 | 143.9 | 156.1 | 31.1 | 78.7 | 30.3 | 19.3 | 29.2 | 39.5 |
| PHBV/PCL (1:2)/CNC(PVP)–5 | 55.7 | 144.9 | 156.8 | 29.7 | 84.8 | 32.2 | 13.9 | 32.4 | 29.9 |
| PHBV/PCL (1:2)/CNC(PVP)–10 | 56.0 | 145.2 | 157.0 | 30.7 | 84.5 | 30.0 | 11.9 | 31.8 | 27.1 |
| PHBV/PCL (1:2)/CNC(PVP)–15 | 55.8 | 143.9 | 156.3 | 30.9 | 80.0 | 29.5 | 13.2 | 33.1 | 31.8 |
| PHBV/PCL (1:2)/CNC(PAM)–5 | 55.9 | 143.9 | 156.1 | 31.7 | 79.8 | 30.8 | 14.9 | 31.0 | 32.1 |
| PHBV/PCL (1:2)/CNC(PAM)–10 | 55.6 | 142.9 | 155.8 | 31.6 | 76.4 | 33.3 | 13.5 | 35.4 | 30.7 |
| PHBV/PCL (1:2)/CNC(PAM)–15 | 56.3 | 144.4 | 156.4 | 30.7 | 79.9 | 27.8 | 12.9 | 31.2 | 31.1 |