Research Article
The Effect of Soluble Ammonium Polyphosphate on the Properties of Water Blown Semirigid Polyurethane Foams
Table 1
Burning test results with different content APP for SPUF.
| | Samples | APP wt/% | LOI/% | Horizontal burning rate (mm/min)/self-extinguished time (s) | UL-94 |
| | SPUF | 0 | 18.9 | 49.01 | | | SPUF/APP5 | 5 | 22.2 | 36.61 | HBF | | SPUF/APP7 | 7 | 22.4 | 172.81 SET | HBF | | SPUF/APP9 | 9 | 22.7 | 69.66 SET | HBF | | SPUF/APP11 | 11 | 22.8 | 34.52 SET | HBF | | SPUF/APP13 | 13 | 22.9 | 31.52 SET | HBF | | SPUF/APP15 | 15 | 23.2 | 29.94 SET | HF-1 | | SPUF/APP17 | 17 | 24.1 | 28.59 SET | HF-1 | | SPUF/APP19 | 19 | 24.5 | 27.25 SET | HF-1 |
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