Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-11-03
Physics
Condensed Matter
Soft Condensed Matter
24 pages, 14 figures, accepted for publication in Physical Review E
Scientific paper
10.1103/PhysRevE.70.061409
Simulations and Mode-Coupling Theory calculations, for a large range of the arm number $f$ and packing fraction $\eta$ have shown that the structural arrest and the dynamics of star polymers in a good solvent are extremely rich: the systems show a reentrant melting of the disordered glass nested between two stable fluid phases that strongly resemble the equilibrium phase diagram. Starting from a simple model potential we investigate the effect of the interplay between attractive interactions of different range and ultrasoft core repulsion, on the dynamics and on the occurrence of the ideal glass transition line. In the two cases considered so far, we observed some significant differences with respect to the purely repulsive pair interaction. We also discuss the interplay between equilibrium and non equilibrium phase behavior. The accuracy of the theoretical tools we utilized in our investigation has been checked by comparing the results with molecular dynamics simulations.
Dawson Kenneth A.
Foffi Giuseppe
Reatto Luciano
Tartaglia Piero
Verso Federica Lo
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