阻燃改性氢氧化镁/低密度聚乙烯的性能研究

Properties of Flame Retardant Modified Magnesium Hydroxide/Low Density Polyethylene

分别采用两种改性氢氧化镁(MH)为阻燃剂与低密度聚乙烯(LDPE)复合,制备了低密度聚乙烯/改性氢氧化镁(LDPE/MH)阻燃材料,研究了阻燃剂对材料力学性能、阻燃性能、热稳定性、电性能的影响。结果表明:改性氢氧化镁阻燃剂的加入明显提高了材料的阻燃性能,但会降低其力学性能、热稳定性与电性能;采用氨基硅烷偶联剂改性氢氧化镁的低密度聚乙烯阻燃性能优于采用烷基硅烷偶联剂改性氢氧化镁的体系,但其对材料力学性能、电性能的不利影响更加明显。当烷基硅烷偶联剂改性氢氧化镁添加量为70份时,材料的综合性能较佳。

Two kinds of modified magnesium hydroxide(MH) were used as flame retardant, and then compounded with low density polyethylene(LDPE) to prepare LDPE/MH flame retardant materials. The effects of the flame retardants on the mechanical properties, flame retardant properties, thermal stability, and electrical properties of the materials were studied. The results show that the flame retardant properties of the materials increase significantly after adding the modified magnesium hydroxide flame retardant, but the mechanical properties, thermal stability,and electrical properties decrease. The flame retardant of the LDPE with amino silane coupling agent modified magnesium hydroxide is better than that of the LDPE with alkyl silane coupling agent modified magnesium hydroxide, but its adverse effects on mechanical properties and electrical properties of materials are more obvious.When the addition amount of alkyl silane coupling agent modified magnesium hydroxide is 70 phr, the comprehensive properties of the material are better.