Coarse-grained simulations of moderately entangled star polyethylene melts

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In this paper, a previous coarse-grain model [J. T. Padding and W. J. Briels, J. Chem. Phys.117, 925 (Year: 2002)]10.1063/1.1481859 to simulate melts of linear polymers has been adapted to simulate polymers with more complex hierarchies. Bond crossings between highly coarse-grained soft particles are prevented by applying an entanglement algorithm. We first test our method on a virtual branch point inside a linear chain to make sure it works effectively when linking two linear arms. Next, we apply our method to study the diffusive and rheological behaviors of a melt of three-armed stars. We find that the diffusive behavior of the three-armed star is very close to that of a linear polymer with the same molecular weight, while its rheological properties are close to those of a linear chain with molecular mass equal to that of the longest linear sub-chain in the star.
Original languageEnglish
Article number244912
Number of pages9
JournalThe Journal of chemical physics
Issue number24
Publication statusPublished - 28 Jun 2013


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