Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: Crystallization, Nucleation, Self Assembly I (joint session CPP/DY, organized by CPP)
CPP 34.5: Vortrag
Mittwoch, 9. März 2016, 11:00–11:15, H42
Control of homogeneous crystal nucleation in polymers — •Evgeny Zhuravlev1, Jürn Schmelzer1, René Androsch2, and Christoph Schick1 — 1University of Rostock, Institute of Pysics, Wismarsche Str, 43-45, 18057 Rostock — 2Martin-Luther-University Halle-Wittenberg, Center for Engineering Sciences, 06099 Halle/S., Germany
A summary of recent application of Tammann's nuclei development method [1] to fast crystallizing polymers has been laid out to further address the role of pre-formed homogeneous nuclei on crystallization kinetics as well as semi-crystalline morphology. Making use of the separation in time of homogeneous nucleation and growth in the vicinity of glass transition temperature, the nuclei can be pre-formed using the precision and fast temperature control of a fast scanning calorimeter [2]. Further non-isothermal and isothermal heat treatments of these nuclei largely affects on crystallization kinetics and morphology. Combination of these studies contributes to a better understanding of homogeneous nuclei volume density, thermal stability and reordering kinetics. [1] Tammann, G., Number of nuclei in supercooled liquids. Zeitschrift für Physikalische Chemie 1898, 25, 441-479; [2] Zhuravlev, E., et al., Experimental test of Tammann's nuclei development approach in crystallization of macromolecules. Crystal Growth & Design, 2015. 15(2): p. 786-798.