Rheologica Acta

, 50:559 | Cite as

Thermorheological behavior of polyethylene: a sensitive probe to molecular structure

  • Julia A. Resch
  • Ute Keßner
  • Florian J. Stadler
Original Contribution


Recent investigations have shown that different topographies in polyethylene (PE) lead to either thermorheological simplicity (linear and short-chain branched PE) or two different types of thermorheologically complex behavior. Low-density polyethylene (LDPE) has a thermorheological complexity, which can be eliminated by a modulus shift, while long-chain branched metallocene PE (LCB-mPE) has a temperature dependent shape of the spectrum and thus a total failure of the time-temperature superposition principle. The reason for that behavior lies in the different relaxation times of linear and long-chain branched chains, present in LCB-mPE. The origin of the thermorheological complexity of LDPE might be the temperature dependence of the miscibility of the different molar mass fractions that differ in their content of short chain branches.


Polyethylene Thermorheological complexity Molecular architecture Activation energy 



FJS would like to acknowledge financial support from the “Human Resource Development (Advanced track for Si-based solar cell materials and devices, project number: 201040100660)” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy. JAR gratefully acknowledges the German Research Foundation (DFG) for the financial support of parts of this work.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Julia A. Resch
    • 1
    • 2
  • Ute Keßner
    • 1
    • 3
  • Florian J. Stadler
    • 1
    • 4
  1. 1.Institute of Polymer MaterialsFriedrich-Alexander University Erlangen-NürnbergErlangenGermany
  2. 2.Senoplast Klepsch & Co. GmbHPiesendorfAustria
  3. 3.BASF Coatings GmbHMünsterGermany
  4. 4.School of Semiconductor and Chemical EngineeringChonbuk National UniversityJeonjuRepublic of Korea

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