不同抗氧体系对高温热氧老化后PP-R管材料熔融指数的影响  

The Effects of Different Antioxidants on the Melting Flow Index of PP-R Pipe Materials after High-temperature Thermal Oxidation

作　　者：王飞[1] 雷祖碧[1] 王浩江[1] 

机构地区：[1]广州合成材料研究院有限公司,广东广州510665

出　　处：《合成材料老化与应用》2016年第5期5-9,共5页Synthetic Materials Aging and Application

基　　金：广州市产学研协同创新重大专项(项目编号:201601040105)

摘　　要：通过对无规共聚聚丙烯(PP-R)管材料进行抗老化改性,探讨了主抗氧剂、辅助抗氧剂和复配抗氧剂对其高温热氧老化后熔融指数的影响。结果表明,抗氧剂的添加可有效提高PP-R管材料的抗老化性能。经150℃/1200h的高温热氧老化后,未经抗老化改性的PP-R管材料的熔融指数增加了32.7%,通过不同种类抗氧剂的优化复配改性后的PP-R管材料的熔融指数变化率在8%以内,且母粒添加法比助剂直接添加法的效果更佳。PP-R pipe materials were modified with different antioxidants and the effects of primary antioxidants,auxiliary antioxidants and compound antioxidants on the melt index of PP-R pipe materials were investigated. It has been found after 1200 h high temperature thermal-oxidative aging at 150℃ that the addition of antioxidants can effectively improve the anti-oxidation properties of PP-R,and the Melt Flow Index（ MFI） of PP-R without antioxidants dramatically increased by 32. 7%,but that of the PP-R modified with compound antioxidants retained within 8%.Meanwhile,masterbatch addition showed a far better effect than direct powder addition.

关 键 词：聚丙烯 热氧老化 熔融指数 管材 

分 类 号：TQ317.6[化学工程—高聚物工业]