36加工与应用NO.022023塑料科技PlasticsScienceandTechnology芳香席夫碱基阻燃剂的制备及其在聚酰胺6中的应用顾磊1,2,陈爽1,2,肖茹1,2*(1.东华大学高性能纤维及制品教育部重点实验室,上海201620;2.东华大学材料科学与工程学院,上海201620)摘要:为提高聚酰胺6(PA6)用反应型阻燃剂的热稳定性,以对苯二甲醛(TPAL)、对氨基苯甲酸(PABA)、9,10-二氢-9-氧代-10-磷杂菲-10-氧化物(DOPO)与二苯基氧膦(DPO)为原料,制备芳香席夫碱基磷氮协效阻燃剂TMA-DOPO和TMA-DPO,对产物的结构及热稳定性进行表征。通过熔融共聚制备阻燃PA6(FRPA6s),在TMA-DOPO中分别引入二乙基次磷酸铝(AlPi)和三聚氰胺氰尿酸盐(MCA)以协效阻燃,研究阻燃剂对PA6相对黏度、热稳定性、阻燃性能和力学性能的影响。结果表明:TMA-DOPO的热稳定性更优异。引入阻燃剂后,FRPA6s的热稳定性、相对黏度、拉伸强度均下降,阻燃性能提高。相比PA6,当TMA-DOPO与MCA(或AlPi)引入量分别为己内酰胺质量的5%、3%,TMA-DPO引入量为7%时,使FRPA6s垂直燃烧达到V-0级,极限氧指数(LOI)分别提升至30.7%、30.3%和29.7%。关键词:芳香席夫碱基阻燃剂;磷氮协效;聚酰胺6中图分类号:TQ323.6文献标识码:A文章编号:1005-3360(2023)02-0036-07DOI:10.15925/j.cnki.issn1005-3360.2023.02.008PreparationofAromaticSchiff-BasedFlameRetardantandItsApplicationinPolyamide6GULei1,2,CHENShuang1,2,XIAORu1,2*(1.KeyLaboratoryofHighPerformanceFibersandProducts,MinistryofEducation,DonghuaUniversity,Shanghai201620,China;2.CollegeofMaterialsScienceandEngineering,DonghuaUniversity,Shanghai201620,China)Abstract:Inordertoimprovethethermalstabilityofreactiveflameretardantsforpolyamide6(PA6),twoaromaticSchiff-basedphosphorus-nitrogensynergisticflameretardantsTMA-DOPOandTMA-DPOweresynthesizedbyterephthalaldehyde(TPAL),p-aminobenzoicacid(PABA),9,10-dihydro-9-oxo-10-phosphafi-10-oxide(DOPO),anddiphenylphosphine(DPO).Thestructureandthermalstabilityoftheproductswerealsocharacterized.FlameretardantPA6s(FRPA6s)werepreparedbymeltcopolymerization,whilealuminumdiethylphosphinate(AlPi)andmelaminecyanurate(MCA)wasintroducedintotheTMA-DOPOsystemrespectivelytosynergisticallyflameretardant.Theeffectsofflameretardantsonther...