Title: The crystallization and melting of linear polyethylene studied by temperature-modulated SAXS and WAXD
Authors: Goderis, Bart ×
Reynaers, Harry
Koch, MHJ #
Issue Date: Jan-2002
Publisher: Wiley-v c h verlag gmbh
Series Title: Macromolecular symposia vol:190 pages:75-78
Abstract: Temperature-reversible and -irreversible morphological events could be separated in the case of linear polyethylene during quasi-isothermal crystallization by using simultaneous temperature-modulated synchrotron SAXS and WAXD. Crystallization and subsequent annealing was followed at 126 degreesC for 90 min while applying a temperature modulation with an amplitude of 1 degreesC and a period of 2 min. The crystal growth rate associated with the irreversible part of the crystallization decreases with increasing temperature in a cycle, The crystalline lamellae irreversibly thicken with time. The actual crystallite thickness, however, exhibits a superimposed modulation out of phase with that of the temperature modulation. Melting was studied during heating at 1 degreesC/min after cooling at 10 degreesC/min. A temperature modulation was superimposed with an amplitude of 2 degreesC and a period of 3 min. Once again temperature-reversible crystal thickness changes and irreversible crystal thickening could be observed.
ISSN: 1022-1360
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Chemistry - miscellaneous
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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