Synergistic Effect between Aluminum Hypophosphite and Alkyl-Substituted Phosphinate in Flame-Retarded Polyamide 6
Synergistic Effect between Aluminum Hypophosphite and Alkyl-Substituted Phosphinate in Flame-Retarded Polyamide 6
复制标题
次磷酸铝与烷基取代次膦酸盐在阻燃聚酰胺 6 中的协同效应
DOI：
10.1021/ie4009056
复制
发表时间：
2013-12-04
影响因子：
4.2
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
--
作者：
Zhao, Bin;Chen, Li;Wang, Yu-Zhong
通过引入次磷酸铝（AP）和异丁基次膦酸铝（APBu），形成了一种新型的PA 6二元阻燃体系。最佳阻燃配方为1：1（AP：APBu，共15 wt %），所得阻燃PA 6的LOI值可达28.3 vol %，UL-94 V-0级。锥形量热仪测试表明，含有二元阻燃剂的样品变得不那么易燃，具有较低的峰值热释放速率（PHRR，259 kW/m2）。动态振荡流变学和同步热重-差示扫描量热法的结果证明，交联反应存在于样品中含有AP。通过SEM和激光拉曼光谱分析了炭层的形貌，结果表明，同时含有AP和APBu的样品形成了更有效的炭。结果表明，AP与APBu复配阻燃PA 6时存在协同阻燃作用。因此，该系统中的一个简短的协同机制。
A novel binary flame-retardant system was formed by introducing aluminum hypophosphite (AP) and aluminum isobutylphosphinate (APBu) together for PA6. The optimum flame retardant formulation was 1:1 (AP:APBu, 15 wt % in total), and the resulting flame-retardant PA6 could achieve a LOI value of 28.3 vol % and UL-94 V-0 rating. Cone calorimeter testing showed the samples containing binary flame retardants became less flammable with lower peak heat release rate (PHRR, 259 kW/m2). Dynamic oscillatory rheology and simultaneous thermogravimetry–differential scanning calorimetry results proved that cross-linking reactions existed in the samples containing AP. Morphology of the char layers was analyzed via SEM and laser Raman spectroscopy, and the results demonstrated the samples containing both AP and APBu formed more effective char. These results revealed that flame-retardant synergism existed between AP and APBu when they were combined to flame retard PA6. Consequently, a brief synergistic mechanism in this sys...