Historische Texte in akkadischer Sprache Rykle Borger

Viscosity Overshoot in Biaxial Elongational Flow: Coarse-Grained Molecular Dynamics Simulation of Ring-Linear Polymer Mixtures

“…The simulation code was provided by Nicolson and Rutledge, 27 which led to vigorous studies of extensional flow of polymer melts. [28][29][30][31][32] Especially for ring polymer melts, O'Conner et al found anomalous thickening behaviors owing to "reef knots" 33 or persistent knots made of two rings in uniaxial elongational flow. 31 Very recently, Borger et al found threadingunthreading transition for ring-linear blends in uniaxial elongational flow, 32 where persistent knots were suppressed to form in ring-linear blends.…”

“…[28][29][30][31][32] Especially for ring polymer melts, O'Conner et al found anomalous thickening behaviors owing to "reef knots" 33 or persistent knots made of two rings in uniaxial elongational flow. 31 Very recently, Borger et al found threadingunthreading transition for ring-linear blends in uniaxial elongational flow, 32 where persistent knots were suppressed to form in ring-linear blends. Since the study of ring-linear blends in elongational flows is just beginning, it is expected to find new phenomena in the other elongational flows.…”

“…This fraction is smaller than that in the previous work where the uniaxial elongational flow has represented the stress overshoot phenomena. 32 The melt mixtures of ring and linear polymers under biaxial elongational flow were analyzed by coarse-grained molecular dynamics simulations, and the changes in stress or viscosity over time were investigated. We have visualized the rings and obtained the number of penetrations under biaxial elongational flows.…”