Table 1.
Chosen properties of the studied polylactide (PLA) grades according to the technical datasheets.
| Property | 2500HP | 3100HP | 3260HP | 4032D |
|---|---|---|---|---|
| Mass average molar mass Mw (Da) | 193,250 | 148,250 | 107,500 | 202,000 |
| Polydispersity index (Mw/Mn) | 1.85 | 1.81 | 1.68 | 1.80 |
| Density (g/cm3) | 1.24 | 1.24 | 1.24 | 1.24 |
| Mass flow rate (g/10 min) | 8.0 | 24 | 65 | 7.0 |
| Yield strength (MPa) | 64 a/65.5 c | 65 a/64 c | 64 a | 60 a |
| Elongation at break (%) | 3.6 a/4.3 c | 3.4 a/2.2 c | 3.0 a/1.3 c | 6.0 a |
| Izod’s impact strength (J/m) | 18.7 a/40 c | 16.2 a/32 c | 16 a/16 c | 16.0 a |
| Heat deflection temperature (HDT) (°C) | 54 a/144 c | 54 a/149 c | 56 a/151 c | - |
| Melting temperature (°C) | 165–180 | 165–180 | 165–180 | 155–170 |
a—amorphous; c—crystalline.