DOPO衍生物-APP协同的阻燃水性聚氨酯的制备及性能研究

Preparation and Performance Study of Flame-Retardant Waterborne Polyurethane with Synergistic Effects of DOPO Derivatives and APP

基于聚磷酸铵(APP)阻燃剂与阴离子聚氨酯相容性差,所得聚氨酯燃烧仍然产生大量熔滴,采用磷系阻燃剂对皮革用阴离子水性聚氨酯进行阻燃改性,探究APP和9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)的衍生物(DOPO-PHB)两种阻燃剂协同作用的阻燃改性体系。通过极限氧指数(LOI)、垂直燃烧试验和热重分析考察了其阻燃性能和热降解性能,用拉伸机测定了薄膜的力学性能。结果表明,当添加1%APP-4%DOPO-PHB阻燃剂时,聚氨酯LOI值为27.8%,垂直燃烧达到V-0级别,无熔滴,聚氨酯的力学性能提升,相容性提高。

Due to the poor compatibility between ammonium polyphosphate(APP)flame retardant and anion polyurethane,the resulting polyurethane still produces a large number of droplets when burned.Phosphorus-based flame retardants were used to modify anion waterborne polyurethane for flame retardant enhancement.The optimal dosage of the two flame retardants,APP and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO)derivatives(DOPO-PHB),and an economically efficient flame-retardant modification system were investigated.The flame retardancy and thermal degradation performance were examined through limiting oxygen index(LOI),vertical burning test,and thermogravimetric analysis.The mechanical properties of the resulting film were determined using a tensile testing machine.Results indicate that a LOI value of 27.8%and a V-0 rating in the vertical burning test were achieved when 1%APP and 4%DOPO-PHB were added.Without melting drops,the mechanical properties of polyurethane were improved,and its compatibility was enhanced.