双酚A型2,2-对氨基苯甲酸苯基氧化膦本质阻燃PA66

以自合成的双酚A型2,2-对氨基苯甲酸苯基氧化膦(BNNPO)、 己二胺及PA66盐为原料，通过高温高压(280 ℃，1.7 MPa)聚合制备了本质阻燃PA66树脂。红外分析表明BNNPO盐含有N-P膨胀结构；热分析表明阻燃PA66树脂较纯PA66有更优异的热稳定性；极限氧指数及垂直燃烧法结果显示阻燃PA66具有良好的阻燃性能，当BNNPO含量达4.5 wt%时，极限氧指数(Limiting oxygen index,LOI)及垂直燃烧水平（UL94）分别达28%和V-0；锥形量热法及扫描电镜分析发现BNNPO以气相及凝聚相协效阻燃作用于PA66基体材料；力学性能结果显示BNNPO的引入对PA66的力学性能影响较小。

Essential Flame Retardancy PA66 Polymerized with 2,2-(Amino Acid-Phenyl Phosphine Oxide) Propane

A flame retardancy PA66 resin is prepared by the reaction between hexamethylendiamine and 2,2-(amino acid-phenyl phosphine oxide) propane (BNNPO) synthesized in the lab. The Fourier transform infrared spectroscope (FTIR) results reveal that BNNPO contains N-P groups. The thermogravimetric analysis (TGA) results show that BNNPO possesses significantly the thermal stability. Meanwhile, the FTIR results reveal that BNNPO is grafted in the main chain of PA66 successfully. Compared with the pure PA66, the flame retardancy PA66 is provided with excellent thermal stability by TGA results. The limiting oxygen index (LOI) and UL-94 test results of flame retardancy PA66 reach to 28% and V 0 respectively when the content of BNNPO prepolymer reaches to 4.5 wt%. The flammability and flame retardancy mechanism of flame retardancy PA66 resin are also studied by the cone calorimeter and the scanning electron microscope (SEM) respectively. The mechanical property results show that the flame retardancy PA66 resin keeps the favorably mechanical properties when introducing BNNPO.