Crystalline plasticity in isotactic polypropylene below and above the glass transition temperature
- Author(s)
- G. Polt, F. Spieckermann, H. Wilhelm, Ch. Fischer, E. Schafler, S. Bernstorff, M. Zehetbauer
- Abstract
In-situ X-ray diffraction was applied to isotactic polypropylene with a high volume fraction of α-phase (α-iPP) while it has been compressed at temperatures below and above its glass transition temperature Tg. The diffraction patterns were evaluated by the Multi-reflection X-ray Profile Analysis (MXPA) method, revealing microstructural parameters such as the density of dislocations and the size of coherently scattering domains (CSD-size). A significant difference in the development of the dislocation density was found compared to compression at temperatures above Tg, pointing at a different plastic deformation mechanism at these temperatures. Based on the individual evolutions of the dislocation density and CSD-size observed as a function of compressive strain, suggestions for the deformation mechanisms occurring below and above Tg are made.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- TGM - Technologisches Gewerbemuseum, Elettra-Sincrotrone Trieste S.C.p.A.
- Journal
- Express Polymer Letters
- Volume
- 9
- Pages
- 894-900
- No. of pages
- 7
- ISSN
- 1788-618X
- DOI
- https://doi.org/10.3144/expresspolymlett.2015.81
- Publication date
- 10-2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Materials Chemistry, Chemical Engineering(all), Polymers and Plastics, Physical and Theoretical Chemistry, Organic Chemistry
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/crystalline-plasticity-in-isotactic-polypropylene-below-and-above-the-glass-transition-temperature(f9c59e3b-c00b-4c9f-bd91-163646688af6).html