Study On Montmorillonite, Molydenum Oxide,Antimony Phosphate Collaborated With Halogen-Antimony Flame Retardant Flame Retardant Polyproylene

In this article, organic montmorillonite (OMMT), molybdenum trioxide (MoO3), antimony phosphate and ammonium polyphosphate (APP) collaborate with halogen-antimony flame retardants to flame retardant PP was studied. The flame-retardant synergism of the several kinds of flame retardants and halogen-antimony flame retardant was studied by the tests of oxygen index, horizontal vertical combustion level, tensile strength, bending strength, impact strength and heat weightlessness. The main research contents and conclusions were as follows:(1) The study on Molybdenum-antimony oxide collaborate with DBDPE flame retardant PPThe influences of the size of antimony trioxide (Sb2O3) and the dosages of antimony trioxide (Sb2O3) and molybdenum trioxide (MoO3) on the properties had been studied. The influences of three factors of Sb2O3, MoO3and APP on the flame retardant properties, mechanical properties of PP composites were studied by orthogonal design of L9(33). The results showed that the influence of the size of Sb2O3on the flame retardant properties, mechanical properties of the composites were small, and with the size of Sb2O3decreasing, the thermal stability of the composites could also improve. The oxygen index remained stable after increaseing slowly with the increasing of the dosage of Sb2O3. However, the oxygen index decreased with the increasing of the dosage of MoO3. when the dosages of PP, DBDPE, Sb2O3and MoO3were100,18,4and1g, the oxygen index of the PP composites was the largest, which was25.76%, and its mechanical properties were the best. The influences of MoO3, APP and Sb2O3on the oxygen index of the composites were similar, as well as mechanical properties, and the flame-retardant synergistic was good, and the oxygen index can reach about28%. When the dosages of PP, DBDPE were100g,8g, the best recipe of the orthogonal experiment was A3B1C1, namely Sb2O3was6g, MoO3was1g and APP was6g.(2) The study on the organic montmorillonite collaborate with halogen-antimony flame retardant flame retardant PPThe influences of the dosages of DBDPE/Sb2O3、OMMT and PPMA on the properties of the flame retardant composites were studied. The results showed that the oxygen index of the composites added halogen-antimony flame retardants was obviously increased when compared with the pure PP, and when the dosages of DBDPE, Sb2O3were18g and6g, the oxygen index of the composites was the larest, which was24.99%, namely the flame retardant properties were the best, But the amount of smoke and melt dripping phenomenon were serious. Adding OMMT could improve the mechanical properties of PP composites, the amount of smoke when burning and melt dripping phenomenon, but the oxygen index felled to21.77%. Adding PPMA can further improve combustion dripping phenomenon and the oxygen index to22.5%, promoted the compatibility of the flame retardants and PP, partly improved the mechanical properties and thermal stability of the composites.(3) The study on antimony phosphate replacing part of the antimony trioxide flame retardant PPThe properties of the composites were studied after part of antimony trioxide replaced by antimony phosphate. And it further compared the influences of the properties with others three flame retardants (MoO3, OMMT and APP) instead of part of Sb2O3. The results showed that the flame retardant properties of the composites would be good when the dosage ratio between Sb2O3and antimony phosphate was1/2. And when the ratio between Sb2O3and antimony phosphate was2:1, the thermal stability of the PP composites was well. The influences of different flame retardants on the properties of composites were different, when phosphate antimony, APP partly replacing Sb2O3, the composites have relatively high oxygen index. The influences of phosphate antimony, MoO3on the mechanical properties of PP composites were large, and the dosages should not be high, but the thermal stability of the composites was relatively high. The influence of OMMT on the mechanical properties of the composites was relatively low, and could improve the heat release rate of the materials, but the oxygen index was low. In addition, the APP partly instead of Sb2O3, the thermal stability of the composites was relatively poor.