新型磷氮溴复合阻燃剂的制备及其阻燃聚丙烯的研究

以氢溴酸三聚氰胺盐（MHB）、聚磷酸铵（APP）、阻燃增效协同剂2、3-二甲基-2、3-二苯基丁烷( DMDPB )3种物质为原料复配成一种新型磷溴氮复合阻燃剂，将不同复配比例的复合阻燃剂添加到聚丙烯（PP）中，对阻燃PP材料的阻燃性能、力学性能及熔体流动速率进行测试，探讨3种物质的最佳复配比；并研究了该复合阻燃剂的添加量对材料阻燃性能的影响。结果表明，当MHB：APP：DMDPB的配比为10:10:1时，为最佳复配比；当磷氮溴复合阻燃剂的添加量为2.0 %（质量分数，下同）时，其极限氧指数值为30.8 %，燃烧等级为UL 94 V-1。

The synthesis of a new type of phosphorus and nitrogen compound bromide flame retardants and the study of flame retardant polypropylene

In this paper, a novel flame retardant was prepared by compositing melamine hydrobromide (MHB), ammonium polyphosphate (APP), and 2,3-dimethyl-2,3-diphenyl butane (DMDPB). The flame retardant was tested in polypropylene and the optimal weight ratios of MHB:APP:DMDPB were found being 10:10:1. When loading of the flame retardants was 2.0 wt %，the limited oxygen index value increased to 30.8 %,and combustion grade achieve UL 94 V-1.