Research Article
Synergistic Flame Retardant Effects of Expandable Graphite and Ammonium Polyphosphate in Water-Blow Polyurethane Foam
Table 4
Influence of EG/APP proportion on the performances of SPUF.
| Samples | Ratio of EG/APP | Apparent density (kg/m³) | Shore’s hardness (HA) | Compression strength (MPa) | Modulus of compression (MPa) |
| SPUF | \ | 46.60 ± 0.76 | 55.64 ± 1.32 | 0.056 ± 0.002 | 0.75 ± 0.04 | APP/SPUF | \ | 61.56 ± 0.97 | 64.77 ± 2.10 | 0.064 ± 0.004 | 1.25 ± 0.06 | EG/SPUF | \ | 68.06 ± 1.43 | 58.82 ± 1.33 | 0.051 ± 0.001 | 0.59 ± 0.05 | EG/APP/SPUF-2 | 1 : 4 | 59.60 ± 0.36 | 56.63 ± 1.12 | 0.053 ± 0.003 | 0.70 ± 0.04 | EG/APP/SPUF-4 | 1 : 2 | 66.52 ± 1.02 | 59.54 ± 0.65 | 0.047 ± 0.002 | 0.45 ± 0.02 | EG/APP/SPUF-8 | 2 : 1 | 61.88 ± 0.63 | 58.08 ± 0.53 | 0.044 ± 0.002 | 0.40 ± 0.02 |
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