Coarse-Grained Molecular Dynamics Modeling of a Branched Polyetherimide

نویسندگان

چکیده

A coarse-grained model is developed to allow large-scale molecular dynamics (MD) simulations of a branched polyetherimide derived from two backbone monomers [4,4'-bisphenol dianhydride (BPADA) and m-phenylenediamine (MPD)], chain terminator [phthalic anhydride (PA)], branching agent [tris[4-(4-aminophenoxy)phenyl] ethane (TAPE)]. An atomistic first built for the polyetherimide. systematic protocol based on chemistry-informed grouping atoms, derivation bond angle interactions by direct Boltzmann inversion, parameterization nonbonded potential mean force (PMF) calculations via gas-phase MD atomic group pairs, used construct model. six-pair geometry, with one at center six replicates other placed surrounding central in NaCl structure, has been demonstrated significantly speed up PMF partially capture many-body aspect PMFs. Furthermore, we propose correction term PMFs that can make resulting transferable temperature-wise, enabling thermal expansion property polymer. The applied explore mechanical, structural, rheological properties

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ژورنال

عنوان ژورنال: Macromolecules

سال: 2021

ISSN: ['0024-9297', '1520-5835']

DOI: https://doi.org/10.1021/acs.macromol.0c01440