Effects of tube persistence length on dynamics of mildly entangled polymers

Jian Qin, Scott Thomas Milner, Pavlos S. Stephanou, Vlasis G. Mavrantzas

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Recent atomistic simulations of polyethylene melt afford a close look at the entanglement dynamics of a real polymer. We analyze these results in a new way, by defining the tube primitive path as the mean path of consecutive molecular dynamics trajectories. The result suggests that tube is semiflexible, the persistence length being about half the entanglement length. The time dependent tangent-tangent correlation function of tube primitive path is then used to test the standard molecular model of tube dynamics. It is found that the effect of the semiflexibility is important in the mildly entangled system we studied and that incorporating its effect into the standard tube model improves the theory drastically.

Original languageEnglish (US)
Pages (from-to)707-723
Number of pages17
JournalJournal of Rheology
Volume56
Issue number4
DOIs
StatePublished - Jul 1 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)

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