无卤阻燃尼龙6阻隔防爆材料的制备及研究

Preparation and properties of halogen-free flame retardant nylon 6 explosion proof material

在微胶囊化红磷母粒和氢氧化镁复配体系中添加少量有机蒙脱土(抗滴落剂),研究阻燃剂配比与材料阻燃性能、力学性能之间的关系。采用熔融挤出方式制备无卤阻燃尼龙6阻隔防爆材料,并对材料力学性能、热稳定性、微观形貌进行研究。研究表明:当氢氧化镁和微胶囊化红磷的比例为3∶2时,协同阻燃作用最佳;阻燃剂总量为15%时,材料的阻燃等级达到UL94V-0级别;当加入1%的有机蒙脱土后,阻燃剂总含量由15%降低至14%,仍可保持阻燃级别为V-0。通过热失重分析发现,添加填料可以提高阻隔防爆材料的热稳定性;有机蒙脱土能够插层尼龙6树脂中,提高填料与基体间的相互作用力,具有改善阻隔防爆材料机械性能的作用。

The montmorillonite was added to compound system of microencapsulated Red Phosphorus masterbatch and Magne- sium Hydroxide to research the relationship between flame retardant ratio and flame retardancy or mechanical property of materials. The halogen free flame retardant nylon 6 explosion suppression materials were prepared by melt extrusion, and the mechanical property, thermal stability and micro morphology of the material were studied. The results showed that： when the magnesium hydroxide and the microencapsulation ratio is 3 ： 2, it has the best synergistic effect; when the total amount of flame retardant is 15%, the flame retardant grade of the mate rial reaches UL94 V-0 level; when the organic montmorillonite was added to 1%, the total content of flame retardant was reduced from 15% to 14%, and the flame retardant grade was still V-0. It was found that the filler can improve the thermal stability of the barrier materials by thermogravimetric analysis; the organic montmorillonite can be inserted into nylon 6 resin and can improve the interaction between filler and matrix, which can improve the mechanical properties of nylon 6.