The method of re-introducing atomistic detail into a coarse-grained polymer structure, so-called backmapping, is extended to a nonequilibrium situation. Problems in backmapping coarse-grained polymer models, on which a nonequilibrium shear flow has been imposed, are discussed. A backmapping protocol, where the globally deformed conformations are maintained during backmapping by applying position restraints, is proposed. The local optimization of the atomistic structure is performed in the presence of these restraints. The artifact of segment isolation introduced by position restraints is minimized by applying different restraint patterns iteratively. The procedure is demonstrated on the test case of atactic polystyrene under a steady shear flow. © the Owner Societies 2009.

Backmapping coarse-grained polymer models under sheared nonequilibrium conditions / Chen, X.; Carbone, P.; Santangelo, G.; Di Matteo, A.; Milano, G.; Muller-Plathe, F.. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 11:12(2009), pp. 1977-1988. [10.1039/b817895j]

Backmapping coarse-grained polymer models under sheared nonequilibrium conditions

Milano G.;
2009

Abstract

The method of re-introducing atomistic detail into a coarse-grained polymer structure, so-called backmapping, is extended to a nonequilibrium situation. Problems in backmapping coarse-grained polymer models, on which a nonequilibrium shear flow has been imposed, are discussed. A backmapping protocol, where the globally deformed conformations are maintained during backmapping by applying position restraints, is proposed. The local optimization of the atomistic structure is performed in the presence of these restraints. The artifact of segment isolation introduced by position restraints is minimized by applying different restraint patterns iteratively. The procedure is demonstrated on the test case of atactic polystyrene under a steady shear flow. © the Owner Societies 2009.
2009
Backmapping coarse-grained polymer models under sheared nonequilibrium conditions / Chen, X.; Carbone, P.; Santangelo, G.; Di Matteo, A.; Milano, G.; Muller-Plathe, F.. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 11:12(2009), pp. 1977-1988. [10.1039/b817895j]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/919395
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