硼酸锌协效二乙基次膦酸铝阻燃PA6

采用硼酸锌(ZB)与二乙基次膦酸铝(ADP)协同阻燃聚酰胺6(PA6).对其阻燃性能和力学性能进行了探讨,并运用垂直燃烧、极限氧指数、锥形量热、热失重分析、扫描电子显微镜以及拉曼光谱对阻燃机理进行了探究.结果表明,ZB作为协效剂,与ADP的协同阻燃效果显著;当在PA6中添加1.5％(质量分数,下同)ZB和8.5％ADP...

Synergistic effect of zinc borate and aluminum diethylphosphinate on flame retardancy of PA6

Zinc borate （ZB） as a synergistic flame retardant was compounded with aluminum diethylhypophosphonate （ADP） for flame?retarding nylon 6. The flame retardant properties and mechanical properties of the resultant compounds were evaluated， and their flame retardant mechanism was investigated using vertical combustion， limiting oxygen index， cone calorimetry， thermogravimetric analysis， scanning electron microscopy and Raman spectroscopy. The results indicated that the synergistic flame?retardant effect resulting from ZB and ADP was remarkable. When 1.5 % Zb and 8.5 % ADP were added into PA6， obtained composites achieved a flame?retardant level classification of UL 94 V?0 with a limi?ting oxygen index of 29.8 vol % Compared to the samples without a synergistic agent， their peak heat release rate， average heat release rate， and mass loss rate decreased by 42.7 %， 27.3 % and 32.7 %， respectively. The cone calorimetry analysis indicated that the introduction of ZB into the ADP flame retardant system not only generated a flame?retardant effect of the vapor phase， but also promoted the flame retardancy of condensed phase. This was attributed to a synergistic flame retardant mechanism， mainly based on the gas?phase flame retardancy together with the condensed?phase flame retardancy