Rate mechanism and dislocation generation in high density polyethylene and other semicrystalline polymers
- Author(s)
- Florian Spieckermann, Harald Wilhelm, Gerald Polt, Said Ahzi, Michael Zehetbauer
- Abstract
The aim of the paper was to use recent experimental dislocation data for the development and testing of a dislocation mediated strength model based on that introduced by Scogna and Register for semicrystalline polymers. It is shown that the model can successfully describe measured and evaluated data of high density polyethylene (PE-HD) on the flow stress as function of strain rate and temperature. Similar coincidences of model fit with experimental yield stress data from literature for polypropylene and polyethylene-ethylenemethacrylic acid co-polymers (E/MAA) were found which suggests prevailing of dislocation mediated plasticity mechanisms also in these materials. It also turned out that two parameters of the model – namely the dislocation density and the lamella size – are not determined by the molecular chemistry but by the conditions of processing and/or sample preparation. Therefore the model allows for a reliable estimation of the dependence of the yield stress on these conditions.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Université de Strasbourg, TGM - Technologisches Gewerbemuseum
- Journal
- Polymer
- Volume
- 55
- Pages
- 1217-1222
- No. of pages
- 6
- ISSN
- 0032-3861
- DOI
- https://doi.org/10.1016/j.polymer.2014.01.020
- Publication date
- 03-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103023 Polymer physics, 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Materials Chemistry, Polymers and Plastics, Organic Chemistry
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/rate-mechanism-and-dislocation-generation-in-high-density-polyethylene-and-other-semicrystalline-polymers(5c185363-4f51-44ef-aaf1-3be6e8725c05).html