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Cluster formation in star-linear polymer mixtures: equilibrium and dynamical properties

Autor(en)
Manuel Camargo, Sergei A. Egorov, Christos Likos
Abstrakt

We investigate the influence of the addition of polymer chains on suspensions of low-functionality star polymers in the dilute star regime. We focus on the structural and dynamical features of the mixture by means of Molecular Dynamic simulations, based on a recently introduced model, which coarse-grained the interactions between the two components of the system. Numerical results are compared to the analytical ones, obtained from mode-coupling theory. We find evidence for the formation of transient star clusters upon chain addition, which is induced by the depletion attraction between the stars. Contrary to the case of hard colloids with a depletion-induced short-range attraction and a long range repulsion, the formed clusters are irregular and transient, allowing for particle exchange among themselves.

Organisation(en)
Computergestützte Physik und Physik der Weichen Materie
Externe Organisation(en)
Heinrich-Heine-Universität Düsseldorf, University of Virginia
Journal
Soft Matter
Band
8
Seiten
4177-4184
Anzahl der Seiten
8
ISSN
1744-683X
DOI
https://doi.org/10.1039/c2sm06849d
Publikationsdatum
2012
Peer-reviewed
Ja
ÖFOS 2012
103023 Polymerphysik, 103036 Theoretische Physik, 103015 Kondensierte Materie, 103029 Statistische Physik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/c790a3d6-f090-4bac-bd4c-f98ed4559925