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Influence of Short-Chain Branching of Polyethylenes on the Temperature Dependence of Rheological Properties in Shear

✍ Scribed by Florian J. Stadler; Claus Gabriel; Helmut Münstedt

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
197 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

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 dynamic‐mechanical 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.

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📜 SIMILAR VOLUMES

Influence of branch length on the dynami
Influence of branch length on the dynamic fatigue properties of short-chain branched polyethylenes
✍ Jen-taut Yeh; Huei-song Hong 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 751 KB

## Abstract An investigation of the influence of the short‐chain branch length on the dynamic fatigue behavior of short‐chain branched polyethylenes (SBPE) is reported. The number of fatigue failure cycles (__N__~f~) increases significantly with increasing branch length at temperatures above the β‐