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Factors and levels that were defined to set up the DoE (Design of Experiment). Under the column “Code”, the short names that are used to refer to the factors discussed in the results are reported.
| Factors | Code | Levels | ||||
|---|---|---|---|---|---|---|
| −1 | −0.5 | 0 | 0.5 | 1 | ||
| Concentration of HMW (high molecular weight) (wt%) | HMW content | 0 | 30 | 50 | 70 | 100 |
| Compounding temperature (°C) | T | 175 | 190 | |||
| Screw rotation speed (rpm) | rpm | 150 | 400 | |||
| Rheology analysis temperature (°C) | / | 175 | 190 | |||
