@inproceedings{58723b6bae4d4b8ba780d17968582e7c,
title = "Temperature dependence of the elastic compliance of polyethylenes with different molecular structure",
abstract = "The steady-state recoverable shear compliance, Je0, of commercial linear and long-chain-branched metallocene LLDPE and LDPE was measured at temperatures between 130°C and 190°C. For the linear material and the LDPE containing tree-like branches no distinct temperature dependence of Je0 was found. However, a decrease in J e0 with increasing temperature was observed for the long-chain branched LLDPE (star-like branching topography). This temperature dependence of Je0 can be explained by the analysis of the temperature dependent shape of the relaxation spectra calculated. For the linear-mLLDPE the shape of the spectra is the same for all temperatures leading to thermorheological simplicity and a constant Je0. The spectra of the LDPE are identical in shape in the terminal regime but differ at high relaxation strengths. Thus, a constant Je0 results but also a slight thermorheological complexity in the rubbery plateau. The long-chain branched mLLDPE clearly reveals different temperature dependencies within various parts of the spectra. By this finding the temperature dependence of Je0 can be explained.",
keywords = "Activation energy, Creep-recovery experiments, Linear and long-chain branched metallocene catalyzed polyethylene, Low density polyethylene, Relaxation spectra, Steady-state creep recovery compliance, Thermorheological behavior",
author = "Resch, {Julia A.} and Joachim Kaschta and Stadler, {Florian J.} and Helmut Muenstedt",
year = "2008",
doi = "10.1063/1.2964687",
language = "English",
isbn = "9780735405493",
series = "AIP Conference Proceedings",
pages = "348--350",
booktitle = "The XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting",
}