官能团化聚丙烯改性Mg(OH)_2阻燃PP的热稳定性

Thermal Stabilities of Mg(OH)_2/Polypropylene Composites Modified with Functionalized Polypropylene

制备了官能团化聚丙烯(FPP)、反应性单体AA和在引发剂存在下AA改性氢氧化镁阻燃PP材料,用TGA研究了添加FPP、AA和原位形成FPP对PP、阻燃PP的热稳定性的影响以及抗氧剂对热稳定性的影响。结果表明Mg(OH)_2的加入使PP初始分解温度提高,分解速率降低,热稳定性提高。FPP的加入使高含量Mg(OH)_2阻燃PP热稳定性进一步提高。DCP存在下AA改性有利于提高阻燃PP热稳定性,尤其高用量Mg(OH)_2阻燃PP。在抗氧剂和DCP同时存在下,高用量AA改性阻燃PP具有更高的稳定性。

Mg(OH)2/PP composites modified by functionalized polypropylene (FPP) or acrylic acid (AA) and the formation of in-situ FPP were prepared. The thermal stabilities of PP and modified Mg(OH)2/PP composites were investigated. The results indicated that the addition of Mg(OH)2 increased the thermal stability of PP. Addition of FPP further increased the thermal stability of Mg(OH)2/PP composites. For the Mg(OH)2/PP composites modified with AA, the increase in the thermal stability was observed. However, addition of DCP decreased the thermal stability of Mg (OH)2/PP composites modified with the formation of in-situ FPP. In the presence of antioxidant and DCP, Mg(OH)2/ PP composites modified with high content of AA exhibited high thermal stability.