文章旨在制备一种氮、硅、磷多元协同高效阻燃剂并研究其应用性能。首先用三聚氰胺粉和烯丙基溴合成出烯丙基取代三聚氰胺。将其与乙烯基三甲氧基硅烷共聚后得到了含氮硅三聚氰胺共聚物。按等体积浸渍法，将一定质量的I型聚磷酸铵（I-APP）粉末与等体积的含氮硅三聚氰胺共聚物溶液混合制备氮硅阻燃共聚物包覆I-APP阻燃剂（MAPP）。将聚丙烯（PP）与一定质量分数的I-APP或MAPP阻燃剂先进行预混，然后在双螺杆挤出机中进行熔融共混、挤出、造粒，制备得到PP阻燃复合材料。对PP阻燃复合材料进行了力学和垂直燃烧测试。结果表明：添加MAPP达20%时，其可达V-0阻燃级别，而纯I-APP即使添加30%也仍低于V-0级，且力学性能更低。可见氮硅共聚物包覆I-APP后相容性更好，氮、硅、磷间具有更高的协同阻燃效率。

This article aims to prepare a nitrogen, silicon, and phosphorus multiple synergistic high-efficiency flame retardant and study its application performance. Firstly, allyl substituted melamine was synthesized by melamine powder and allyl bromide. After copolymerizing it with vinyltrimethoxysilane, a nitrogen-silicon containing melamine copolymer was obtained. Using the equal volume impregnation method, a certain mass of Type I ammonium polyphosphate (I-APP) powder is mixed with an equal volume of nitrogen-silicon containing melamine copolymer solution to prepare nitrogen silicon flame retardant copolymer coated I-APP flame retardant (MAPP). Pre mix polypropylene(PP) with a certain mass fraction of I-APP or MAPP flame retardant, and then perform melt blending, extrusion, and granulation in a twin-screw extruder to prepare PP flame retardant composites. Mechanical and vertical combustion tests were conducted on PP flame-retardant composites. The results showed that when MAPP was added up to 20%, it could reach the V-0 flame retardant level, while pure I-APP, even with 30% addition, remained below the V-0 level and had lower mechanical properties. It can be seen that the compatibility of I-APP coated with nitrogen silicon copolymer is better, and the synergistic flame retardant efficiency among nitrogen, silicon, and phosphorus is higher.