茂金属线形低密度聚乙烯的热降解研究  

Thermal Degradation of Metallocene Linear Low Density Polyethylene

作　　者：房海霞[1] 叶永成[1] 白福臣[1] 

机构地区：[1]中科院长春应用化学研究所,吉林长春130022

出　　处：《中国塑料》2004年第4期51-54,共4页China Plastics

摘　　要：研究了光敏剂钴化合物存在时茂金属催化剂和Ziegler Natta催化剂生产的线形低密度聚乙烯 (m PE LLD和PE LLD)的热降解行为 ,测定了降解后产品的熔体流动速率、红外光谱和氧化诱导温度。结果表明 :光敏剂使得加工过程中的降解反应增强 ,氧化诱导温度降低 ,氧化曲线形状发生改变 ;与PE LLD相比 ,光敏剂对增强m PE LLD的降解反应和降低加工后样品的热稳定性的作用更强。Thermal degradation of two linear low density polyethylenes (PE-LLD) prepared with metallocene and Ziegler-Natta catalyst,respectively,containing a photosensitizer was investigated.The melt flow index and the oxidation induction temperature (OIT) of the degradated products were determined.It was found that the photosensitizer promoted the thermal degradation during processing and reduced the OIT of the PE-LLD.m-PE-LLD was more sensitive to the photosensitizer than the regular one.

关 键 词：茂金属线形低密度聚乙烯 光敏化剂 热降解 氧化诱导温度 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]