TY - JOUR
T1 - Evidence of dislocations in melt-crystallised and plastically deformed polypropylene
AU - Wilhelm, Harald
AU - Paris, A
AU - Schafler, Erhard
AU - Bernstorff, Sigrid
AU - Bonarski, J
AU - Ungar, Tamas
AU - Zehetbauer, Michael
N1 - Zeitschrift: Materials Science and Engineering A
DOI: 10.1016/j.msea.2004.03.099
Affiliations: Institute of Materials Physics, University of Vienna, Vienna, Austria; Small Angle Scattering Group, Synchrotron Trieste, Trieste, Italy; Inst. of Metallurgy/Materials Sci., Polish Academy of Sciences, Cracow, Poland; Department of General Physics, Eötvös University Budapest, Budapest, Hungary; Erich Schmid Inst. of Materials Sci., Austrian Academy of Sciences, A-8700 Leoben, Austria; LKT-TGM, Laboratory of Polymer Engineering, Vienna, Austria
Adressen: Wilhelm, H.; Institute of Materials Physics; University of Vienna Vienna, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-10644269740
04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)
PY - 2004
Y1 - 2004
N2 - In view of the lack of other methods in the study of melt-crystallised polymers, this paper reports the application of a new kind of X-ray diffraction profile analysis to investigate dislocations in various plastically deformed ?-phase isotactic polypropylene (?-PP). By means of a two-step evaluation it is shown that dislocations are present in ?-PP and that their density increases with plastic deformation. Compared with metals, very high dislocation densities between 2×1016 and 2.2×1017 m-2 are evaluated which might result to some extent from the presence of uncorrelated lattice defects in the interface between crystalline and amorphous phase. It is shown, however, that the measured dislocation densities are consistent with the assumption that the mean free path of dislocations equals the lamella thickness. Œ 2004 Elsevier B.V. All rights reserved.
AB - In view of the lack of other methods in the study of melt-crystallised polymers, this paper reports the application of a new kind of X-ray diffraction profile analysis to investigate dislocations in various plastically deformed ?-phase isotactic polypropylene (?-PP). By means of a two-step evaluation it is shown that dislocations are present in ?-PP and that their density increases with plastic deformation. Compared with metals, very high dislocation densities between 2×1016 and 2.2×1017 m-2 are evaluated which might result to some extent from the presence of uncorrelated lattice defects in the interface between crystalline and amorphous phase. It is shown, however, that the measured dislocation densities are consistent with the assumption that the mean free path of dislocations equals the lamella thickness. Œ 2004 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.msea.2004.03.099
DO - 10.1016/j.msea.2004.03.099
M3 - Article
SN - 0921-5093
VL - 387-389
SP - 1018
EP - 1022
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
IS - 1-2 SPEC.
ER -