SKM 2021 – wissenschaftliches Programm
CPP 6.23: Poster
Dienstag, 28. September 2021, 17:30–19:30, P
Molecular origins of shear-thinning in polymer melts — •Ranajay Datta, Friederike Schmid, and Peter Virnau — Institute of Physics, Johannes Gutenberg University, Staudingerweg 9, 55128 Mainz, Germany
We investigate the molecular origin of shear-thinning in melts of flexible, semiflexible and rigid oligomers with coarse-grained simulations of a sheared melt . Emergence of entanglements and nematic phases in equilibrium, alignment, stretching and tumbling modes or suppression of the latter all contribute to understanding how macroscopic flow properties emerge from the molecular level. By performing simulations of single chains in shear flow, we identify which of these phenomena are of collective nature and arise through interchain interactions and which are already present in dilute systems.