纳米氢氧化镁阻燃聚丙烯体系的性能研究

Study on Flame-retardant and Mechanical Properties of PP/Nano-Mg(OH)_2 Composites

研究了自制的低成本纳米氢氧化镁与市售普通微米氢氧化镁填充的聚丙烯塑料的阻燃性能和力学性能。氧指数测试和拉伸测试的数据表明,在相同填充质量份数下,纳米氢氧化镁填充的聚丙烯体系具有更高的氧指数、拉伸强度和断裂伸长率。对2种填充体系复合材料断口的场发射扫描电镜(FESEM)观察发现,纳米氢氧化镁与聚合物基体的相容性更好,两者界面间的粘结力更强。因此,填充纳米级氢氧化镁的聚丙烯塑料具有更优异的阻燃性能和力学性能。

Mechanical and flame-retardant properties of polypropylene（PP） filled with self-synthesized nano-Mg（OH）2 and commercial micro Mg（OH）2 are investigated, respectively. The limiting oxygen index test and mechanical test data show that the limiting oxygen index, tensile strength and breaking elongation Of PP/nano-Mg（OH）2 composite have higher values than those of PP/micro-Mg（OH）2 composite. Fracture surface observation of both cornposites indicates that compatibility between the nano-Mg（OH）2 and the polymer is better and cohesion between the two interface is stronger. Consequently, the PP/nano-Mg（OH）2 composite has better flame-retardant and mechanical properties than those of PP/micro-Mg（OH）2 composite.