Diffusion with contour length fluctuations in linear polymer melts

Amalie L. Frischknecht, Scott T. Milner

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

We have calculated the self-diffusion constant in monodisperse linear polymer melts using a recent analytical theory of stress relaxation that incorporates contour-length fluctuations as well as reptation. We find over a broad range of chain lengths N that D approx. N-2.25 before crossing over to the asymptotic reptation result of D approx. N-2. This result is in agreement with recent experiments and single-chain simulations and resolves a long-standing discrepancy between the scaling of the zero-shear viscosity and the diffusion constant.

Original languageEnglish (US)
Pages (from-to)5273-5277
Number of pages5
JournalMacromolecules
Volume33
Issue number14
DOIs
StatePublished - Jul 11 2000

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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