双峰分布聚乙烯的动态流变行为  

Dynamic Rheology Behavior of Bimodal Polyethylene

作　　者：陈洋[1] 邹华维[1] 刘鹏波[1] 罗文洲[1] 

机构地区：[1]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2011年第6期60-63,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50903049)

摘　　要：以六种不同分子量分布特征的聚乙烯为研究对象,通过动态流变、高压毛细管流变以及凝胶渗透色谱(GPC)等分析测试手段,对这六种聚乙烯的结构和性能进行对比分析。高压毛细管的结果表明,A样品表现出更好加工稳定性和更宽的加工速率窗口,结合该样品的分子量及分子量分布特别是动态流变行为,笔者认为,样品中高低分子量部分的微相分布状态对体系系带分子的形成及材料的应用性能具有重要影响,从而为双峰分布聚乙烯的核心结构的表征和性能预测提供快速有效的方法。We compared the structure and properties of six different polyethylene materials by gel permeation chromatography （GPC）, high-pressure capillary theological analysis and dynamic theological test. The high-pressure capillary rheological results show that sample A has better process stability and higher critical shear rate of unsteady flow. Combined with the molecular weight, molecular weight distribution and especially dynamic theological behavior of the sample, we analyzed that the micro phase distribution of the high and low molecular weight parts decides the quality and quantity of the tie chain and the application performance of the samples, from which we can obtain a quick evaluation method to characterize the core structure and predict the application performance of the bimodal polyethylene .

关 键 词：双峰分布聚乙烯 动态流变 微相分布 表征 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]