| Ammonium polyphosphate,melamine,sulfamic acid,aluminium,aluminum sulfate as flame retardants,average burning time and impact strength as indexes,with multiple attribute orthogonal experimental design and intiutive analysis,it develops both retarding properties and the impact strength of the polyurethane foam plastics. And it carries on SEM,IR spectra,impact strength,horizontal and vertical burning tester and TGA means. The result indicates as follow:1) The formulation of flame retardant PUF:100 phr NT-4110,0.10 phr dibutyltion dilaurate,isocyanate index for 0.95,phosphorus in flame retardant agents for 2.0% of the quality of total material,20 phr n-pentane and temperature for 18℃,its density is 48.46kg·m-3, its impact strength is 2.24 kJ·m-2, its horizontal and vertical burning time is 4 s;100 phr NGRS-4028,0.18 phr dibutyltion dilaurate,isocyanate index for 1.05,phosphorus in flame retardant agents for 2.5% of the quality of total material,temperature for 24℃and 18 phr n-pentane,its density is 58.90kg·m-3, its impact strength is 4.03 kJ·m-2, its horizontal and vertical burning time is 8 s;100 phr NT-4110,3 phr sulfamic acid,20 phr aluminium,20 phr aluminum sulfate,its density is 62.44kg·m-3, its impact strength is 2.69 kJ·m-2, its horizontal and vertical burning time is 18 s.2) Density of flame retardant PUF decreases with the increase of the amount of n-pentane,increases with the increase of temperature, the decrease of the amount of dibutyltion dilaurate and isocyanate index.3) Density of flame retardant PUF increases with great amount of flame retardants,and impact strength decreases;flame retardant added can improve the thermal stability,average burning time is sharply reduced,bringing it up to non-inflammable of B1. |
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