阻燃用氢氧化镁的复合改性研究

Research of Compound Modification of Magnesium Hydroxide for Flame–retardance

十二烷基硫酸钠/硬脂酸钠/聚乙二醇6000复配改性剂对氢氧化镁进行改性研究。通过改性前后氢氧化镁的吸油值及其在液体石蜡中的吸光度等性能来评价改性效果,采用红外谱图研究了表面改性分子与氢氧化镁表面的作用机理。实验结果表明,在改性剂的用量为5%,配料比为1∶2∶1,改性温度为70℃,改性时间为60 min条件下制备的产品性能最好,红外光谱显示表面改性剂分子在氢氧化镁表面发生化学吸附键合。

Magnesium hydroxide was modified by sodium dodecyl sulfate/sodium stearate/polyethylene glycol（PEG）6000 composite modifier.Modified effects were evaluated by measurement of oil absorbility and absorbance in liquid paraffin of the system.Modification mechanism of magnesium hydroxide was reserched by means of IR.Experiment results showed that the products with excellent modification effect was prepared under the condition of 5 % in dosage,the mass ratio of composite modifier was 1∶2∶1,and 70 ℃ in temperature,60 min in time.IR showed that modifier molecules are absorbed onto the surface of magnesium hydroxide mainly by chemisorption bond.