Table 2.
Analysis of variance model for Young’s modulus against processing parameters.
| Source | df | Sum of Squares | Mean Squares | F-Value | p-Value |
|---|---|---|---|---|---|
| Model | 9 | 187,000 | 20,778 | 14.18 | 0.000 |
| Linear | 5 | 138,934 | 27,787 | 18.97 | 0.000 |
| Mould Temperature | 1 | 114,005 | 114,005 | 77.83 | 0.000 |
| Injection Speed | 1 | 11,190 | 11,190 | 7.64 | 0.011 |
| Back-Pressure | 1 | 27 | 27 | 0.02 | 0.893 |
| Melt Temperature | 1 | 1444 | 1444 | 0.99 | 0.331 |
| Holding Time | 1 | 12,268 | 12,268 | 8.37 | 0.008 |
| 2-Way Interactions | 4 | 48,066 | 12,016 | 8.2 | 0.000 |
| Injection Speed × Melt Temperature | 1 | 12,591 | 12,591 | 8.6 | 0.007 |
| Injection Speed × Holding Time | 1 | 11,461 | 11,461 | 7.82 | 0.010 |
| Back-Pressure × Melt Temperature | 1 | 7558 | 7558 | 5.16 | 0.033 |
| Melt Temperature × Holding Time | 1 | 16,456 | 16,456 | 11.23 | 0.003 |
| Residual | 23 | 33,692 | 1465 | ||
| Curvature | 1 | 0 | 0 | 0.00 | 0.994 |
| Lack-of-Fit | 22 | 33,692 | 1531 | ||
| Total | 32 | 220,692 |