Influence of short-chain branching of polyethylenes on the temperature dependence of rheological properties in shear
Influence of short-chain branching of polyethylenes on the temperature dependence of rheological properties in shear
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DOI：
10.1002/macp.200700267
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发表时间：
2007-11-20
影响因子：
2.5
通讯作者：
Muenstedt, Helmut
中科院分区：
文献类型：
--
作者：
Stadler, Florian J.;Gabriel, Claus;Muenstedt, Helmut
这一贡献描述了短链支化的聚乙烯（PE）熔体在剪切流变性能的温度依赖性的影响。所研究的材料是线性和短链支化的窄分子量分布的聚乙烯催化的。通过动态力学分析确定线性粘弹性能。短链支化（SCB）导致流动活化能增加。发现活化能随着重量共聚单体含量的增加而线性增加。
This contribution describes the influence of short-chain branching on the temperature dependence of rheological properties of polyethylene (PE) melts in shear. The materials investigated are linear and short-chain branched, metallocene-catalyzed PEs of narrow molecular mass distribution. the linear viscoelastic properties are determined by dynamicmechanical analysis. Short-chain branching (SCB) leads to an increase of the flow activation energy. The activation energy was found to increase linearly with rising weight comonomer content.