纳米改性氢氧化铝与包覆红磷协效阻燃尼龙66的研究

文中分别研究了纳米改性氢氧化铝 (CG-ATH)单独使用以及与包覆红磷协效阻燃尼龙66(PA66 )复合体系的阻燃性能和力学性能。将纳米CG-ATH和包覆红磷以不同比例添加到PA6-6中,制得复合材料。用氧指数法测定了复合体系的阻燃性能,此外还进行了拉伸和冲击性能测试。结果表明,包覆红磷与纳米CG-ATH具有一定的协同效应,当复合材料中PA66、包覆红磷和纳米CG-ATH的质量比为100∶13∶20时,该复合体系的氧指数为33,而只PA66和纳米CG-ATH的质量比为100∶40的 PA66复合体系的氧指数29.5,但是100g PA6 6中,只添加15g包覆红磷时,该复合体系的氧指数只有27,该协效阻燃体系的拉伸强度为79.3MPa,拉伸弹性模量为2182.3MPa,断裂伸长率为5.9% ,冲击强度为4.5kJ/m² 。因此,纳米改性氢氧化铝与包覆红磷的协同效应,实现了在无机阻燃剂添加量相对较少且保证 PA66本身力学性能的前提下,大幅度改善材料阻燃性能的要求。

Synergetic fire retardant effect of encapsulated red phosphorus and modified GG-ATH for PA-66

The article discussed the fire retardant effect and mechanical properties of PA66 system containing nano CG-ATH only and synergetic effect of encapsulated red phosphorus and nano CG-ATH respectively. Nano CG-ATH and encapsulated red phosphorus were added into PA66 with different loading levels. LOI was measured as fire retardancy property and tensile strength, impact strength and elongating at break were measured as the mechanical properties for the system. The results show that it is possible to get good synergetic effect and fire retardant PA66 products with better fire retardancy and mechanical properties while using 13phr encapsulated red phosphorus and 20phr nano CG-ATH with LOI 33, tensile strength 79.3MPa, modulus 2*!182.3*!MPa elongation at break 5.9% and impact strength 4.5kJ/m 2.