Crystalline plasticity in isotactic polypropylene below and above the glass transition temperature
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 (MX...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2015-10-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0006191&mi=cd |
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| author | G. Polt F. Spieckermann H. Wilhelm Ch. Fischer E. Schafler S. Bernstorff M. Zehetbauer |
| author_facet | G. Polt F. Spieckermann H. Wilhelm Ch. Fischer E. Schafler S. Bernstorff M. Zehetbauer |
| author_sort | G. Polt |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-e911ae90e6bc44ecb94a24bf18539ca3 |
| institution | DOAJ |
| issn | 1788-618X |
| language | English |
| publishDate | 2015-10-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-e911ae90e6bc44ecb94a24bf18539ca32025-08-20T03:19:10ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2015-10-0191089490010.3144/expresspolymlett.2015.81Crystalline plasticity in isotactic polypropylene below and above the glass transition temperatureG. PoltF. SpieckermannH. WilhelmCh. FischerE. SchaflerS. BernstorffM. ZehetbauerIn-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.http://www.expresspolymlett.com/letolt.php?file=EPL-0006191&mi=cdMechanical propertiespolypropylenedislocationX-ray diffractionplasticity |
| spellingShingle | G. Polt F. Spieckermann H. Wilhelm Ch. Fischer E. Schafler S. Bernstorff M. Zehetbauer Crystalline plasticity in isotactic polypropylene below and above the glass transition temperature eXPRESS Polymer Letters Mechanical properties polypropylene dislocation X-ray diffraction plasticity |
| title | Crystalline plasticity in isotactic polypropylene below and above the glass transition
temperature |
| title_full | Crystalline plasticity in isotactic polypropylene below and above the glass transition
temperature |
| title_fullStr | Crystalline plasticity in isotactic polypropylene below and above the glass transition
temperature |
| title_full_unstemmed | Crystalline plasticity in isotactic polypropylene below and above the glass transition
temperature |
| title_short | Crystalline plasticity in isotactic polypropylene below and above the glass transition
temperature |
| title_sort | crystalline plasticity in isotactic polypropylene below and above the glass transition temperature |
| topic | Mechanical properties polypropylene dislocation X-ray diffraction plasticity |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0006191&mi=cd |
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