茂金属聚乙烯改性高流动性聚乙烯性能研究  

Study on Properties of High-Fluid Polyethylene Modified With Metallocene Polyethylene

作　　者：李健[1,2] 朱宏勇[2] 陈明华[3] 贾红兵[1] 

机构地区：[1]南京理工大学软化学和功能材料教育部重点实验室 [2]中国人民解放军78668部队 [3]中国石化扬子石油化工有限公司塑料厂

出　　处：《现代塑料加工应用》2012年第5期1-4,共4页Modern Plastics Processing and Applications

摘　　要：为改善高流动性聚乙烯(HF-PE)的性能,采用茂金属乙烯-丁烯共聚物(mEDC)进行改性,通过熔融共混法制得mEDC/HF-PE共混物。研究了mEDC/HF-PE共混物的流变行为、力学性能、结晶性能,并和国内外HF-PE的性能进行比较。结果表明:mEDC改性HF-PE专用料结晶温度和熔融温度稍高于7200HF-PE和52518HF-PE的,力学性能与7200HF-PE的相当,熔体流动速率(MFR)大于7200HF-PE和52518HF-PE的,相同温度下黏度均小于7200HF-PE和52518HF-PE的,在高剪切速率下具有高的温度敏感性,具有好的流动性和加工性能。To improve the property of high-fluid polyethylene（HF-PE）, HF-PE was modified with metallocene ethylene-butene copolymer（mEDC） through mechanical blend- ing. The rheological behavior, mechanical properties and crystallization properties of mEDC/HF-PE blends were studied and made a comparison with the property of HF-PE both domestic and overseas. The results show that the crystallization temperature and the melting temperature of mEDC/HF-PE are a little higher than that of 7200 and 52518 HF-PE grade PE, and the mechanical properties are close to that of 7200 grade PE. The melt flow rate of mEDC/HF-PE is greater than that of 7200 and 52518 HF- PE grade PE, and the viscosity is less than that of 7200 and 52518 HF-PE grade PE at the same temperature. The mEDC/HF-PE has a high temperature sensitivity, and good liquidity and processing properties at high shear rate.

关 键 词：茂金属聚乙烯 高流动性聚乙烯熔体流动速率流变行为 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]