Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: POSTERS Polymerphysics
CPP 34.44: Poster
Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A
Crystallization kinetics of monodisperse n-alkanes at high supercooling — •Sergey Adamovsky and Christoph Schick — University of Rostock, Institute of Physics, Polymer Physics Group, 18051 Rostock, Germany
Production of monodisperse n-alkanes1 allows to study the nanoscale process of polymer crystallization by measurements on a macro scale. Because of exactly the same chain length a measurable amount of material behaves similar way. This way providing an opportunity to derive conclusions about individual crystals from the measured sample-average properties.
Mostly DSC equipment was used for calorimetric study of these materials which is limited to tens of seconds in time resolution; thus only the high temperature slow-end tail of melt crystallization was accessible.
Fast scanning calorimetric technique2 developed in our lab was applied to study crystallization behavior of these materials. This allowed studying kinetics of crystallization from melt in a wide temperature range with crystallization halftimes from milliseconds to hours.
Results for three selected samples are presented: C122H146, C162H326 and C390H782.
1G. M. Brooke, S. Burnett, S. Mohammed et al., Journal of the Chemical Society-Perkin Transactions 1 (13), 1635-1645 (1996).
2S. Adamovsky and C. Schick, Thermochim. Acta 415, 1-7 (2004).