Synthesis Of A Flame Retardant SPCA And Application For PP

Polypropylene(PP) is a large tonnage common plastic, which is easy-to-shape and no toxicity to human, has cheap raw material prices. Currently being widely used in the production in all areas of life, including clothing, decoration, flooring, medical, geotextiles, automotive, automotive textiles, various home textiles, wall covering, etc. However, polypropylene (PP) is a highly flammable, which has a low oxygen index value, only between 17% to 19% so that it greatly limits the applications in these areas. The flame retardant research is popular which trying to find one of the best flame retardant, and has already made certain achievements. But in recent years, following the increased awareness of environmental protection, low smoke, non-toxic, non-corrosive gases, reusable polypropylene flame retardants have become hot focus.In this paper, a new spiro-intumescent flame retardant(Spirophosphate Cyanuric Acid)has been designed and synthetizied. First using pentaerythritol and phosphorus oxychloride as the raw material to be generated against Spiro dichloride. Then Spiro dichloride and cyanuric acid as intermediates at a ratio of about 1:1 are added in to a certain amount acetone and refluxing about 8h, using triethylamine as acid-accepter and catalyst, a kind of white power is obtained. The analysis of FTIR,IHNMR,31PNMR were done.We incorporate the SPCA into PP with different proportions for its flame retardant research. Through the study of the mechanical properties, combustion performance, thermal degradation behavior of the material and the morphology of the material and the layers, we find that with the increase of the flame retardant, the oxygen index also increased. When the dosage of the flame retardant is 30%, the material will pass the the vertical burning test V1, in which case the oxygen index value is 27.1%. The mechanical tests showed that the addition of flame retardants can enhance the impact strength and flexural strength. The fracture surface SEM results of the samples show that SPCA and the PP has good compatibility, the cone calorimeter experiments of the materials show that there is a good combustion behavior for them, which reduce the burning rate and mass loss rate and the release of CO so that reduce the fire hazard.To further enhance the anti-flammable ability of SPCA and reduce the amount and cost of the flame retardant, we incorporate the APP into, the SPCA in different proportions, in which the total dosage of the flame retardant is 30%, then we put them into the PP for its flame research. LOI, VL-94, TGA and other experiments have been studied in this section. These experimental results show that no matter which formulation of the SPCA and APP, the effect are better than pure SPCA. Considering the addition of flame retardants, we select the total dosage of flame retardant of 30%, weight ratio of SPCA and APP of 1:1 for CONE and SEM experiments. The results show that the addition of APP substantially increase the SPCA's fire-retardant capability.