Table 3 DSC results (given values are the mean of the three experiments for each use-cycle).
Indices | Number of reuse cycle of the PA12 powder | |||||
|---|---|---|---|---|---|---|
m = melting | 0 (virgin) | 1-time reused | 2-times reused | 3-times reused | 4-times reused | 5-times reused |
c = crystallisation | ||||||
Tm-onset (°C) | 171.42 | 175.05 | 174.68 | 174.63 | 174.78 | 174.39 |
Tm-endset (°C) | 184.90 | 185.21 | 185.41 | 185.60 | 185.67 | 185.98 |
Melting shoulder (°C) | 13.19 | 9.26 | 10.72 | 10.61 | 10.74 | 11.09 |
Tm-peak (°C) | 179.83 | 180.30 | 180.75 | 180.61 | 180.55 | 181.02 |
Tc-onset (°C) | 154.32 | 154.77 | 154.88 | 155.08 | 155.27 | 155.49 |
Tc-endset (°C) | 148.27 | 148.80 | 148.83 | 148.89 | 148.95 | 148.84 |
Crystallisation shoulder (°C) | 6.05 | 6.04 | 6.05 | 6.19 | 6.40 | 6.65 |
Tc-peak (°C) | 152.14 | 152.68 | 152.71 | 152.86 | 152.89 | 152.93 |
ΔHm (J/g) | 101.71 | 98.77 | 98.06 | 97.37 | 96.02 | 94.03 |
ΔHc (J/g) | 58.34 | 57.54 | 57.54 | 57.38 | 58.00 | 56.93 |
Degree of crystallinity (%) | 49.05 | 47.19 | 46.63 | 46.39 | 45.88 | 44.92 |
