【摘要】 主要研究了纳米氢氧化镁湿法表面改性的工艺过程,将改性前后的粉体添加到软质PVC体系中测定该体系的氧指数、拉伸强度和断裂伸长率,同时与普通氢氧化镁粉体进行了比较。实验结果表明:在本实验条件下最佳的改性刺为硬脂酸锌,改性时间为0.5 h,改性温度为85℃,改性剂用量为5％(质量分数);改性纳米氢氧化镁粉体比普通氢氧化镁和未改性纳米氢氧化镁粉体提高了软质PVC体系的阻燃性能,同时降低了对体系机械力学性能的影响。更多还原

【Abstract】 The process of surface modification used in nano - sized magnesium hydroxide (MH) was investigated. The oxygen index, tense strength and elongation at break were determined to ascertain the best conditions of modification while nano - sized MH has been added into flexible PVC At the same time it was compared with ordinary MH. The experimental result shows that zinc stearate is the most excellent modifier in this experiment, and the modified time is 0.5 hour and dosage of modifier is 5 % and modified temperature is 85℃. Furthermore, the flame retardance and mechanical properties were also improved greatly by adding modified nano-sized MH into flexible PVC.更多还原