Equilibration and deformation of amorphous polystrene: scale-jumping simulational approach

T. Mulder, V.A. Harmandaris, A.V. Lyulin, N.F.A. Vegt, van der, B. Vorselaars, M.A.J. Michels

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

A polymer sample-preparation method (extended-chain condensation, ECC) based solely on molecular-dynamics simulations has been compared to a connectivity-altering Monte Carlo method (coarse-grained end-bridging, CGEB). Since the characteristic ratio for the CGEB samples is closer to the experimental value, ECC results in polymer structures that are too compact. The stress-strain relations are different in the strain-hardening regime. For CGEB samples, a stronger strain hardening is observed and the strain-hardening modulus is more realistic; for the CGEB polystyrene (PS) sample GR = 9 ± 1 MPa is found versus GR = 4 ± 2 MPa for the ECC samples. These differences have to be attributed to a steeper increase in the contributions to the total stress from bond- and dihedral angles for CGEB than for ECC samples.
Original languageEnglish
Pages (from-to)290-300
JournalMacromolecular Theory and Simulations
Volume17
Issue number6
DOIs
Publication statusPublished - 2008

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