稀土偶联剂（REC）对PP／Mg（OH）2体系性能的影响

研究了稀土偶联剂（ＲＥＣ）处理对ＰＰ／氢氧化镁（Ｍｇ（ＯＨ）２）体系的燃烧性能、流动性能、力学性能及老化性能的影响。未经处理的Ｍｇ（ＯＨ）２在填充量超过５０％时，ＰＰ／Ｍｇ（ＯＨ）２体系的ＯＩ≥２８．５，但这时冲击强度不足纯ＰＰ的３０％，熔体流动速率低于０．６ｇ／１０ｍｉｎ；而填料用２．５％（重量）ＲＥＣ处理后，填充量为５０％的体系冲击强度接近纯ＰＰ，ＭＦＲ达２．８ｇ／１０ｍｉｎ；ＲＥＣ对Ｍｇ（Ｏ

Influences of Rare Earth Coupling Agent on Properties of PP/Mg(OH)_2

Influences of a rare earth complex (REC) as a coupling agent of Mg(OH) 2 on the flame retardance, flowability, mechanical properties and anti ageing performance of PP/Mg(OH) 2 were investigated. When the dosage of untreated Mg(OH) 2 was over 50% (mass content),the oxygen index of the system was more than 28.5, impact strength was 30% that of pure PP and melt flow rate was 0.6g/10min. Once Mg(OH) 2 was treated with rare earth coupling agent, PP/Mg(OH) 2 had almost the same impact strength as pure PP and melt flow rate 2.8 g/10min. Mg(OH) 2 can accelarate the photo oxidation and retard the thermal oxidation of PP. REC has a slight promoting action on the photo oxidation and has no obvious influence on the thermal oxidation,but has excellent modification effect on the surface of Mg(OH) 2.