Research Article
Research on Recovery Mechanism and Process of Waste Thermosetting Phenolic Resins Based on Mechanochemical Method
Table 5
Variance analysis of regression models.
| | Source of variance | Change rate of the cross-linking signal intensity Y1 | Yield of the recycled powder Y2 | | Sum of squares | Degree of freedom | F value | Significance level ( value) | Sum of squares | Degree of freedom | F value | Significance level ( value) |
| | x1 | 86.27 | 1 | 264.01 | <0.0001 | 1882.53 | 1 | 411.66 | <0.0001 | | x2 | 6.2 | 1 | 18.98 | 0.0007 | 87.06 | 1 | 19.04 | 0.0006 | | x3 | 34.53 | 1 | 105.66 | <0.0001 | 524.82 | 1 | 114.76 | <0.0001 | | x4 | 1.28 | 1 | 3.91 | 0.0679 | 20.59 | 1 | 4.5 | 0.0522 | | x1x2 | 1.92 | 1 | 5.88 | 0.0294 | 18.83 | 1 | 4.12 | 0.0619 | | x1x3 | 5.38 | 1 | 16.46 | 0.0012 | 61.02 | 1 | 13.34 | 0.0026 | | x1x4 | 0.62 | 1 | 1.89 | 0.191 | 8.56 | 1 | 1.87 | 0.1929 | | x2x3 | 4.03 | 1 | 12.34 | 0.0034 | 56.73 | 1 | 12.41 | 0.0034 | | x2x4 | 4.62E − 3 | 1 | 0.014 | 0.907 | 0.058 | 1 | 0.013 | 0.9119 | | x3x4 | 0.092 | 1 | 0.28 | 0.6038 | 1.25 | 1 | 0.27 | 0.6096 | | x12 | 24.21 | 1 | 74.10 | <0.0001 | 182.68 | 1 | 39.95 | <0.0001 | | x22 | 6.37 | 1 | 19.49 | 0.0006 | 98.97 | 1 | 21.64 | 0.0004 | | x32 | 2.75 | 1 | 8.41 | 0.0116 | 37.16 | 1 | 8.13 | 0.0128 | | x42 | 1.28 | 1 | 3.92 | 0.0676 | 19.52 | 1 | 4.27 | 0.0578 |
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Significant difference ( ); extremely significant difference ( ). |
