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Molecular weight
Molecular weight
The material data on molecular weight are optional entries.
The MFI and MVI (with given test temperature and weight) are only used to complete the material data for information purposes and are not required for any calculation.
The parameters for the material degradation calculation can be activated as required.
If the checkbox is activated, the 5 material parameters $K_T$, $n_T$, $K_\dot{\gamma}$, $n_\dot{\gamma}$ and $\eta_\infty$ can be entered. These are required for the calculation of molecular degradation.
Exemplary values
| Plastic type | MFR (g/10 min) | $K_T [°C] $ | $n_T [-] $ | $K_\dot{\gamma} [1/s] $ | $n_\dot{\gamma} [-]$ | $\eta_\infty^* [-]$ |
|---|---|---|---|---|---|---|
| PP | 3,0 | 345,7 | 15,29 | 1171,4 | 1,47 | 0,415 |
| PP | 3,0 | 355,3 | 13,75 | 882,3 | 1,62 | 0,417 |
| PP | 47,0 | 1617,0 | 3,15 | 6989,3 | 0,85 | 0,531 |
| PP | 8,0 | 344,8 | 15,41 | 1861,1 | 1,15 | 0,386 |
| PS | 1,5 | 17326 | 1,22 | 5749,3 | 0,81 | 0,306 |
| PS | 12,0 | 761,5 | 40,36 | 8740,6 | 0,63 | 0,361 |