不同粒径EG阻燃聚丙烯性能研究  

Study on Properties of Flame Retardant PP With Different-Size EG Particles

作　　者：邹晓燕[1] 黄兆阁[1] 方立翠[1] 

机构地区：[1]青岛科技大学高性能聚合物及成型技术教育部工程研究中心,山东青岛266042

出　　处：《现代塑料加工应用》2010年第3期19-21,共3页Modern Plastics Processing and Applications

摘　　要：采用150μm和23μm两种粒径可膨胀石墨(EG)对聚丙烯(PP)进行阻燃改性,利用氧指数测定仪和锥型量热仪考查了EG阻燃PP体系的燃烧性,并且测定了不同体系的力学性能。结果表明,150μm的EG填充25份时,体系极限氧指数(LOI)可以达到31%;EG的加入能明显降低PP的热释放速率(HRR)、有效燃烧热(EHC)和质量损失速率(MLR);体系的拉伸强度、冲击强度变化不大,弯曲强度稍有增大,断裂伸长率下降明显;适当量EG的加入,不仅使PP阻燃性能大大提高,而且能够改善PP材料的力学性能。The flame retardanee of PP was modified by filling with 150 μm and 23 μm EG. The mechanical properties of different systems were studied by using oxygen index determinator and conical calorimeter. The results show that the mass fraction of EG（150μm） is 25 phr, the LOI is 31 %. The HRR, EHC and MLR of PP can be reduced significantly by adding EG. The tensile strength and impact strength of composites are not changed greatly, the bending strength is slightly increased, elongation at break is dropped down significantly. Not only the flame retardance of PP is greatly improved by appropriate amount of EG,but also mechanical properties are improved.

关 键 词：可膨胀石墨 阻燃聚丙烯 锥型量热仪 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]