Research Article
Optimization of Exothermic, Foaming, and Mechanical Properties of Modified Polyurethane as Filling Material for Goaf Sealing Wall
Table 6
Variance analysis results of expansion ratio.
| | Factors | Square of deviance | Degree of freedom | F | Fα = 0.1 | Significant level |
| | Polyether polyols a : b | 0.965 | 3 | 0.488 | 2.810 | Significant | | Catalyst A33 | 0.555 | 3 | 0.281 | 2.810 | | Surfactant BL-8468 | 4.415 | 3 | 2.232 | 2.810 | | Error | 5.93 | | | | | Sum | 11.865 | 9 | | |
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