焦磷酸哌嗪及其复配阻燃剂对共聚聚丙烯阻燃性能的研究  

Flame Retardant Performance of Copolymerized Polypropylene with Piperazine Pyrophosphate and Compound Flame Retardants

作　　者：许肖丽 许保云 叶文 XU Xiao-li;XU Bao-yun;YE Wen(Shanghai Research Institute of Chemical Industry,State Key Laboratory of Polyolefins and Catalysis,Shanghai Key Laboratory of Catalysis Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]上海化工研究院有限公司聚烯烃催化技术与高性能材料国家重点实验室,上海市聚烯烃催化技术重点实验室,上海200062

出　　处：《塑料工业》2020年第5期117-122,共6页China Plastics Industry

摘　　要：采用极限氧指数(LOI)、垂直燃烧(UL94)、热失重分析(TG)和微型燃烧量热仪(MCC)研究焦磷酸哌嗪(PAPP)、聚磷酸三聚氰胺(MPP)和氧化锌(ZnO)复配阻燃剂对嵌段共聚聚丙烯阻燃性能、成炭性能和燃烧性能的影响,通过扫描电子显微镜(SEM)观察材料燃烧后形成炭层的表观形貌。结果表明,PAPP具有较好的成炭性,PAPP与MPP按质量比为2∶1复配,加入少量ZnO作协效剂,复配阻燃剂添加量在30%,阻燃复合材料的LOI提高至42. 4%,通过UL94 V-0级(1. 6 mm)。阻燃剂的加入,在材料表面形成连续致密的炭层,提高材料在高温时的热稳定性,600℃的残炭率增加近五倍,抑制材料的降解,显著降低燃烧过程中释放的热量,减少火灾危险性。The effects of flame retardants with piperazine pyrophosphate( PAPP),melamine pyrophosphate( MPP) and zinc oxide( ZnO) on the flame retardancy,charring and combustion properties of block copolymerized polypropylene( K8003) were studied by limit oxygen index( LOI),vertical burning test( UL94),thermogravimetric analysis( TG) and micro combustion calorimeter( MCC). The surface morphology of carbon layer formed after the material burned was investigated by scanning electron microscopy( SEM). The results show that PAPP has good charring property,when the mass ratio of PAPP and MPP is 2 ∶ 1 and a small amount of ZnO is added as synergist. When the addition of the compound flame retardant is 30%,the LOI could increase to 42. 4%and reach UL94 V-0( 1. 6 mm). With the addition of flame retardant,a continuous dense carbon layer is formed on the surface of the material,which can improve the thermal stability of the material at high temperature. The amount of carbon residue at 600 ℃ could increase nearly five times,the degradation of the material is inhibited,the heat released in the combustion process is significantly reduced and the fire risk is reduced.

关 键 词：焦磷酸哌嗪 聚磷酸三聚氰胺 共聚聚丙烯 协效阻燃 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ325.14[化学工程—合成树脂塑料工业]