DOPO对热塑性聚氨酯自熄性的影响  

The Effect of DOPO on the Self-extinguish Ability of Thermoplastic Polyurethane

作　　者：贾振兴[1] 秦家强[1] 房权生[2] 张华荣[2] 马龙[1] 何成勇[1] 刘向阳[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]宝胜科技创新股份有限公司,江苏宝应225800

出　　处：《塑料工业》2014年第6期112-116,共5页China Plastics Industry

摘　　要：使用极限氧指数仪、垂直燃烧仪、TGA-FTIR研究了9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)对热塑性聚氨酯(TPU)自熄性的影响,并阐释了其快速自熄的机理。结果显示,添加少量的DOPO可以使TPU的氧指数从23.1%提升到29.3%,样品在点火结束后1 s内自熄。对样品热氧分解产物分析显示,DOPO分解产生的PO·等自由基会抑制某些活性自由基,使TPU分解产物被氧化程度降低,破坏了燃烧进行的链式反应,抑制TPU燃烧,使其快速自熄。The effect on the self-extinguish ability of thermoplastic polyurethane （TPU） by 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide （DOPO） was studied by limiting oxygen index （LOI）,vertical burning test （UL94）,thermogravimetric analysis-Fourier transform infrared spectroscopy （TGA-FTIR）,and its rapidly self-extinguishing mechanism was also illustrated here.The results showed that,with a small amount of DOPO,the LOI of the composites could increase to 29.3％ from 23.1％,and would selfextinguish within 1 second,reach UL94 V-2.The analysis of volatiles degraded by samples showed that,the PO · and other radicals degraded by DOPO quenched the active radicals by the initial degradation of TPU,ruined the chain oxidation reaction of combustion,inhibiting the combustion of TPU,made it rapidly selfextinguished.

关 键 词：热塑性聚氨酯 9 10-二氢-9-氧杂-10-磷杂菲-10-氧化物 阻燃 自熄 热氧分解 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]