期刊
JOURNAL OF CHEMICAL PHYSICS
卷 153, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0019945
关键词
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资金
- Clermont Auvergne University (UCA)
- CNRS
- Agence Nationale de la Recherche of the French government [16-IDEX-0001 CAP 20-25]
- SIGMA Clermont
- Michelin
Despite the fact that anisotropic particles have been introduced to describe molecular interactions for decades, they have been poorly used for polymers because of their computing time overhead and the absence of a relevant proof of their impact in this field. We first report a method using anisotropic beads for polymers, which solves the computing time issue by considering that beads keep their principal orientation alongside the mean local backbone vector of the polymer chain, avoiding the computation of torques during the dynamics. Applying this method to a polymer bulk, we study the effect of anisotropic interactions vs isotropic ones for various properties such as density, pressure, topology of the chain network, local structure, and orientational order. We show that for different classes of potentials traditionally used in molecular simulations, those backbone oriented anisotropic beads can solve numerous issues usually encountered with isotropic interactions. We conclude that the use of backbone oriented anisotropic beads is a promising approach for the development of realistic coarse-grained potentials for polymers.
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