Structural arrest in dense star polymer solutions

Abstract

The dynamics of star polymers has been investigated via extensive Molecular- and Brownian Dynamics simulations for a large range of functionality $f$ and packing fraction $\eta$. The calculated isodiffusivity curves display both minima and maxima as a function of $\eta$ and minima as a function of $f$. Simulation results are compared with theoretical predictions based on different approximations for the structure factor. In particular, the ideal glass transition line predicted by mode-coupling theory is shown to exactly track the isodiffusivity curves, offering a theoretical understanding for the observation of disordered arrested states in star polymer solutions.

4 pages, Revtex, to be published in PRL

References in corpus (9)

• Higher order glass-transition singularities in colloidal systems with attractive interactions
• Reentrant glass transition in a colloid-polymer mixture with depletion attractions
• The Phase Diagram of Star Polymer Solutions
• Ideal glass-glass transitions and logarithmic decay of correlations in a simple system
• How does the relaxation of a supercooled liquid depend on its microscopic dynamics?
• Confirmation of Anomalous Dynamical Arrest in attractive colloids: a molecular dynamics study
• Effective interaction between star polymers
• Evidence for Unusual Dynamical Arrest Scenario in Short Ranged Colloidal Systems
• Anomalous structure factor of dense star polymer solutions

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