硼酸锌协效二乙基次膦酸铝阻燃PA6  

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

作　　者：杨正 王振华 鲁世科 柳妍 房晓敏 李建通[2] 刘保英 丁涛 YANG Zheng;WANG Zhenhua;LU Shike;LIU Yang;FANG Xiaoming;LI Jiantong;LIU Baoying;DING Tao(Henan Engineering Laboratory of Flame Retardant and Functional Materials,Kaifeng 475004,China;College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China)

机构地区：[1]阻燃与功能材料河南省工程实验室,河南开封475004 [2]河南大学化学化工学院,河南开封475004

出　　处：《中国塑料》2022年第1期120-127,共8页China Plastics

基　　金：国家自然科学基金(51703051);河南省高等学校重点科研项目(21A430005)。

摘　　要：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时,PA6/ADP/ZB复合材料达到UL 94 V-0级,极限氧指数达到29.8%,其热释放速率峰值、平均热释放速率和质量损失速率比未添加ZB协效剂的试样分别降低了42.7%,27.3%和32.7%;锥形量热分析表明,当在ADP阻燃体系中引入ZB后,既促进了ADP阻燃体系的气相阻燃作用,同时也促进了凝聚相阻燃作用,是一种以气相阻燃为主,兼具凝聚相阻燃的协同阻燃机制。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 limiting 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.

关 键 词：聚酰胺6 二乙基次膦酸铝 硼酸锌 协同作用 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]