焦磷酸哌嗪/聚磷酸铵对硅灰石增强聚丙烯的阻燃应用研究  

Flame Retardant Application of Piperazine Pyrophosphate/Ammonium Polyphosphate on Wollastonite Reinforced Polypropylene

作　　者：张炎 林凤龙 吴银财 王胜龙 刘子腾 李辉[1] 宋立军 ZHANG Yan;LIN Fenglong;WU Yincai;WANG Shenglong;LIU Ziteng;LI Hui;SONG Lijun(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;Xiamen Institute of Rare Earth Materials,Chinese Academy of Sciences,Xiamen 361021,China;CAS Fire Technical Co.,Ltd.,Xiamen 361021,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]厦门稀土材料研究所,福建厦门361021 [3]中科易朔(厦门)防火技术服务有限公司,福建厦门361021

出　　处：《塑料工业》2022年第5期177-183,206,共8页China Plastics Industry

基　　金：厦门市科技项目产学研项目(350Z20203083,350Z20203082);中国科学院福建省STS项目(2021T3011),江西省自然科学基金(20212BAB203014)。

摘　　要：采用焦磷酸哌嗪(PAPP)和聚磷酸铵(APP)作为复配阻燃剂,研究不同配比的复配阻燃剂对硅灰石增强聚丙烯(WPP)的协效阻燃作用。结果表明,复配阻燃剂添加总量在30%,PAPP与APP的质量比为1∶1时,阻燃复合材料的垂直燃烧等级可通过UL94 V-0级,极限氧指数(LOI)提高到36.2%;与纯WPP相比,阻燃WPP的总热释放量(THR)和总烟释放量(TSP)均显著降低,PAPP和APP之间存在明显的协同阻燃作用。此外,阻燃复合材料具有优异的刚性,相比于WPP,弹性模量提高了49.7%。复配阻燃剂可显著提高WPP热稳定性,抑制了聚合物的降解,800℃时的残炭率达39.6%。利用扫描电镜(SEM)和拉曼光谱对残碳分析发现,复配阻燃剂促进了连续致密炭层的形成,提高了炭层的石墨化程度。Piperazine pyrophosphate(PAPP)and ammonium polyphosphate(APP)were utilized as compound flame retardants with different proportions to prepare the flame retardant wollastonite reinforced polypropylene(WPP),and the synergistic flame retardant properties were investigated.The results show that the vertical combustion grade of flame retardant composites could pass UL94 V-0,and the limit oxygen index(LOI)increases to 36.2%,when the amount of composite flame retardant is 30%and the mass ratio of PAPP to APP is 1∶1.Comparing with pure WPP,the total heat release(THR)and total smoke release(TSP)of flame retardant WPP decrease significantly,a obvious synergy effect between PAPP and APP is discovered.In addition,the flame retardant composite has excellent rigidity,and the elastic modulus increases 49.7%,comparing with WPP.The compound flame retardant can significantly improve the thermal stability of WPP and inhibit the degradation of the polymer.The carbon residue rate at 800℃could reach 39.6%.Scanning electron microscopy(SEM)and Raman spectroscopy are employed to analyze the residual carbon.The compound flame retardant could promote the formation of continuous dense carbon layer and improve the graphitization degree of carbon layer.

关 键 词：聚磷酸铵 焦磷酸哌嗪 硅灰石增强聚丙烯 协效阻燃 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ314.262