Table 5.
Thermal properties of the injection-molded poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)]/hydroxyapatite nanoparticle (nHA) parts in terms of glass transition temperature (Tg), cold crystallization temperature (Tcc), melting temperatures (Tm1 and Tm2), cold crystallization enthalpy (∆Hcc), melting enthalpy (∆Hm), and maximum degree of crystallinity (χc max).
| Part | Tg (°C) | Tcc (°C) | Tm1 (°C) | Tm2 (°C) | ΔHcc (J/g) | ΔHm (J/g) | Xc max (%) |
|---|---|---|---|---|---|---|---|
| P(3HB-co-3HHx) | −0.3 ± 0.1 | 49.8 ± 0.5 | 112.9 ± 0.5 | 139.7 ± 0.3 | 20.7 ± 0.5 | 31.2 ± 0.4 | 21.4 ± 1.8 |
| P(3HB-co-3HHx) + 2.5 nHA | −0.2 ± 0.1 | 52.1 ± 0.4 | 113.6 ± 0.3 | 140.9 ± 0.4 | 29.8 ± 0.4 * | 35.0 ± 0.5 * | 24.3 ± 2.4 * |
| P(3HB-co-3HHx) + 5 nHA | −0.4 ± 0.2 | 54.1 ± 0.2 | 113.8 ± 0.4 | 139.4 ± 0.2 | 31.8 ± 0.6 * | 40.1 ± 0.3 * | 28.9 ± 2.2 * |
| P(3HB-co-3HHx) + 10 nHA | −0.4 ± 0.2 | 57.4 ± 0.3 * | 114.3 ± 0.2 | 139.0 ± 0.3 | 29.0 ± 0.5 * | 32.5 ± 0.4 * | 24.7 ± 1.5 * |
| P(3HB-co-3HHx) + 20 nHA | −0.3 ± 0.1 | 55.9 ± 0.4 * | 113.4 ± 0.5 | 139.1 ± 0.4 | 25.9 ± 0.4 * | 29.0 ± 0.1 * | 24.8 ± 1.4 |
* Indicates a significant difference compared with the previous sample (p < 0.05). Level of significance (p) values are included in Table S2.