Regensburg 2010 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Crystallization and Self Assembly II

CPP 9.9: Vortrag

Montag, 22. März 2010, 16:00–16:15, H48

Temperature dependent changes in the mechanism of plastic deformation of Polypropylene — •Konrad Schneider and Andreas Schöne — Leibniz-Institut für Polymerforschung Dresden, Hohe Str. 6, 01060 Dresden, Germany

The mechanical behaviour of semi-crystalline polymers is dependent on the mechanical behaviour of the crystalline and the amorphous phase as well as their interaction. All those are temperature dependent. Online-WAXS and -SAXS enables to monitor strain dependent the changes within the different phases during deformation and fracture. For the example of Polypropylene it will be demonstrated how the initial lamellae break down into crystalline blocks which disappear in oriented stands in the case of cold drawing, accompanied by cavitation. At higher temperatures the crystalline blocks remain stable and become arranged between fibrilar crystals.