Dynamical properties of different models of elastic polymer rings: Confirming the link between deformation and fragility

Abstract

This paper was selected as Featured ARTICLES YOU MAY BE INTERESTED INTuning the permeability of regular polymeric networks by the cross-link ratio

Structure, Dynamics, and Rheology of Realistic Gaussian-Core Fluids: Unexpected Anomalies and Their Macromolecular Origin

“…22,25 In recent numerical studies, Gnan et al unveil the importance of the intraparticle degrees of freedom in shaping the dynamics of soft particles in the overpacked regime. 26,27 In this case, the intraparticle flexibility leads to serious particle deformation that cannot be accurately modeled by ultrasoft potentials. 26 Compared with the two-dimensional (2D) polymer ring simulated by Gnan and Zaccarelli, 26 molecular architectures of realistic ultrasoft particles are more complicated.…”

“…Experiments confirm that ultrasoft potentials nicely predict the structure , and dynamics , of ultrasoft particles at low and intermediate densities. Nevertheless, it is found that the small-angle scattering spectra of some ultrasoft colloids deviate from the calculations using this coarse-grained approach at denser conditions. , In recent numerical studies, Gnan et al unveil the importance of the intraparticle degrees of freedom in shaping the dynamics of soft particles in the overpacked regime. , In this case, the intraparticle flexibility leads to serious particle deformation that cannot be accurately modeled by ultrasoft potentials . Compared with the two-dimensional (2D) polymer ring simulated by Gnan and Zaccarelli, molecular architectures of realistic ultrasoft particles are more complicated. − This gap between the coarse-grained model and realistic ultrasoft colloids at high concentrations calls for further experimental investigations to fill.…”