Flame Retardant Properties Of Melamine Polyphosphate

Fire as a multiple incident is so significant to the community to bring serious consequences.Clean,new,environmentally friendly melamine flame retardant material has a good price,flame retardant performance has been widely used,the research by the majority of scientific research workers of great concern.In this paper,a new flame retardant Melamine Polyphosphate(MAPP)synthesis method was proposed by acetonitrile and acetic acid/polyphosphoric acid system.The inorganic salts of melamine polyphosphate were analyzed and the different metal ions The mechanism of toxic and corrosive gases and soot during combustion or decomposition was analyzed and characterized by characterization of the properties of the organic flame retardant carrier material represented by nylon(PA).In this paper,melamine and polyphosphoric acid were used as raw materials.ZnO,MgO and Al(OH)3 were used as metal ion source materials,and the mixture of acetonitrile and acetic acid was prepared by heating,cooling and drying.MAPP-Mg,MAPP-Zn and MAPP-Al were used to investigate the effects of MAPP-Mg,MAPP-Mg and MAPP-The ratios of MAPP-Mg,MAPP-Al and MAPP-Zn to melamine in acetic acid system were 1:1.2,3:4 and 1:1.8,respectively.The ratio of Zn to melamine was 1:1,2:3 and 1:1.7 The amount of acetonitrile and acetic acid added should be maintained at a 2:1 relationship with polyphosphoric acid.At the same time,the structure,composition and appearance of melamine polyphosphate flame retardant materials were studied by Fourier transform infrared spectroscopy(FTIR),elemental analysis(EDS),scanning electron microscopy(SEM)and thermogravimetric analysis(TG)Morphology and thermal properties were characterized and analyzed.Melamine polyphosphate was added to nylon 66(PA66),and the horizontal and vertical burning test,tensile-elongation/impact strength test and limit oxygen index(LOI)were measured for the composite materials for combustion performance research and analysis.FTIR analysis and EDS results show that the stability of the functional group covalent bonds is strongly related to the degree of binding of the metal element ions to the functional groups of the flame retardant material.The characteristic peaks of MAPP-Mg,MAPP-Al and MAPP-Zn,C=O,P=O stretching vibration peak,C=N stretching vibration peak The presence of MAPP-Mg and MAPP-Zn showed the characteristic peaks of NH3+,indicating that the chemical changes occurred,and the higher concentration products were obtained.The dispersion of the matrix material in acetonitrile solvent and acetic acid solvent system was observed by SEM,and the appearance was in accordance with the theoretical requirements.TG analysis results show that the rate of MAPP-Mg is low and the weight loss rate reaches and plays a role in gas-phase flame retardation.The thermogravimetric peak of MAPP-Al has the potential to show that there is a mixture.The level of burning of pure PA66 material reached the level of UL94-V-2,and the addition of MAPP-Mg,MAPP-A1 and MAPP-Zn was added to PA66 in the presence of PA66.The overall level of combustion have reached the UL94-V-0 level,in line with flame retardant requirements.The results of flame retardancy(LOI)melamine polyphosphate MAPP-Mg,MAPP-AI and MAPP-Zn flame retardant PA66 were 28.0%,30.1%and 28.3%,respectively.The flame retardant properties of PA66 were significantly improved by analyzing the melamine polyphosphate system.