Generation of Well-Relaxed All-Atom Models of Large Molecular Weight Polymer Melts: A Hybrid Particle-Continuum Approach Based on Particle-Field Molecular Dynamics Simulations

A procedure based on Molecular Dynamics (MD) simulations employing soft potentials derived from self-consistent field (SCF) theory (named MD-SCF) able to generate well-relaxed all-atom structures of polymer melts is proposed. All-atom structures having structural correlations indistinguishable from...

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Vydáno v:Journal of chemical theory and computation Ročník 10; číslo 12; s. 5651 - 5667
Hlavní autoři: De Nicola, Antonio, Kawakatsu, Toshihiro, Milano, Giuseppe
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 09.12.2014
ISSN:1549-9626
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Abstract A procedure based on Molecular Dynamics (MD) simulations employing soft potentials derived from self-consistent field (SCF) theory (named MD-SCF) able to generate well-relaxed all-atom structures of polymer melts is proposed. All-atom structures having structural correlations indistinguishable from ones obtained by long MD relaxations have been obtained for poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) melts. The proposed procedure leads to computational costs mainly related on system size rather than to the chain length. Several advantages of the proposed procedure over current coarse-graining/reverse mapping strategies are apparent. No parametrization is needed to generate relaxed structures of different polymers at different scales or resolutions. There is no need for special algorithms or back-mapping schemes to change the resolution of the models. This characteristic makes the procedure general and its extension to other polymer architectures straightforward. A similar procedure can be easily extended to the generation of all-atom structures of block copolymer melts and polymer nanocomposites.
AbstractList A procedure based on Molecular Dynamics (MD) simulations employing soft potentials derived from self-consistent field (SCF) theory (named MD-SCF) able to generate well-relaxed all-atom structures of polymer melts is proposed. All-atom structures having structural correlations indistinguishable from ones obtained by long MD relaxations have been obtained for poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) melts. The proposed procedure leads to computational costs mainly related on system size rather than to the chain length. Several advantages of the proposed procedure over current coarse-graining/reverse mapping strategies are apparent. No parametrization is needed to generate relaxed structures of different polymers at different scales or resolutions. There is no need for special algorithms or back-mapping schemes to change the resolution of the models. This characteristic makes the procedure general and its extension to other polymer architectures straightforward. A similar procedure can be easily extended to the generation of all-atom structures of block copolymer melts and polymer nanocomposites.
Author De Nicola, Antonio
Kawakatsu, Toshihiro
Milano, Giuseppe
Author_xml – sequence: 1
  givenname: Antonio
  surname: De Nicola
  fullname: De Nicola, Antonio
  organization: IMAST Scarl-Technological District in Polymer and Composite Engineering, Piazza Bovio 22, Napoli, Napoli I-80133, Italy
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  givenname: Toshihiro
  surname: Kawakatsu
  fullname: Kawakatsu, Toshihiro
  organization: Department of Physics, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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  givenname: Giuseppe
  surname: Milano
  fullname: Milano, Giuseppe
  organization: IMAST Scarl-Technological District in Polymer and Composite Engineering, Piazza Bovio 22, Napoli, Napoli I-80133, Italy
BackLink https://www.ncbi.nlm.nih.gov/pubmed/26583248$$D View this record in MEDLINE/PubMed
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Title Generation of Well-Relaxed All-Atom Models of Large Molecular Weight Polymer Melts: A Hybrid Particle-Continuum Approach Based on Particle-Field Molecular Dynamics Simulations
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