普通与纳米三氧化二锑对尼龙6性能的影响

Effect of Nano-Sb 2O3 and Micro-Sb2O3 on Property of Nylon 6

采用普通三氧化二锑（Sb2O3）和等离子体法制备的纳米三氧化二锑（nano—Sb2O3）制备阻燃尼龙6（PA6），通过氧指数（LOI）、热降解（TG）及TEM等检测，研究了普通Sb2O3与nano—Sb2O3对PA6的阻燃性能和力学性能的影响。结果表明：随着Sb2O3添加量的增加，普通Sb2O3与nano—Sb2O3对PA6氧指数影响的变化趋势类似，但nano—Sb2O3／PA6复合材料的氧指数可达到30％，普通Sb2O3／PA6材料氧指数仅为28．5％，且达到极值时，nano—Sb2O3的添加量较普通Sb2O3的至少减少25％；当普通Sb2O3和nano—Sb2O3的质量分数为6％时，PA6的热降解外推温度分别提高约15℃和20℃；添加nano—Sb2O3后，材料拉伸性能和冲击性能较添加普通Sb2O3更加恶化；当质量分数为6％时，普通Sb2O3在尼龙6中颗粒尺寸分布为15～600nm，nano—Sb2O3在PA6巾分散较均匀，一次颗粒尺寸约为10～50nm，有部分聚集。

The flame-retardant nylon 6 was prepared with micron-Sb 203 and nano-Sb 2O3 which was produced by plasma, and its flame-retardancy and mechanical properties were studied by limited oxygen index （LOI）, thermal degradation （TG） and TEM detection. The results showed, with the content of Sb2O3increased, the LOI＇s trend of the micron-Sb2O3/nylon 6 and nano-Sb2O3/nylon 6 was same, but the LOI of nano-Sb2O3/nylon 6 was 30%, while the micron-Sb2O3/nylon 6 was only 28.5%, and the amount of the nano-Sb2O3 was reduced by 25% when the value of LOI reached the maximum; As the amount of Sb 2O3 was 6% , the temperature extrapolation of nano-Sb203/nylon 6 and micron-Sb2O3/nylon 6 were increased by 20 and 15 ℃ respectively comparing to the pure nylon 6; The tensile properties and the impact properties of the nano-Sb203/nylon6 was deteriorated than the micron-Sb2O3/nylon 6 composite, when the amount of Sb2 03 was 6% , the size of distribution of micron-Sb2O3 in nylon 6 was 15 -600 nm, the once size of distribution of nano-Sb2O3 in nylon 6 was 10 -50 nm and its distribution was more uniform with little part clustering.