16:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
“Deformation instabilities and lamellae fragmentation during plastic deformation of polyethylene”
The outstanding mechanical performance of semicrystalline polymers can be attributed to their unique morphology and the robust phase interconnectivity through numerous chains intersecting the amorphous-crystalline interface. Deformation of a semicrystalline polymer is a complicated process, involving all elements of their complex morphology. In this process, different micro-mechanisms are activated at various stages. Furthermore, the active mechanisms can be adjusted with advancing strain due to interactions between adjacent amorphous and crystalline layers, which are tightly connected and therefore are forced to deform jointly. These interactions can also lead to some deformation instabilities, which in turn, may effect in opening new deformation paths and/or launch alternative mechanisms previously inaccessible, and therefore may appear very important part of the deformation sequence. […]