Role of distributions of intramolecular concentrations on the dynamics of miscible polymer blends probed by molecular dynamics simulation

Wenjuan Liu, Dmitry Bedrov, Sanat K. Kumar, Boris Veytsman, Ralph H. Colby

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Using molecular dynamics simulations we show that a given monomer in a miscible polymer blend experiences broad distributions of both connectivity driven self-concentrations and thermodynamically controlled intermolecular concentration fluctuations. While these distributions should play a significant role in determining the constituent's dynamics across the whole concentration range, the distribution of self-concentrations is particularly important in the dilute limit, where intermolecular concentration fluctuations should be absent. These conclusions allow us to rationalize the recent literature results that report the apparent self-concentration determined in the dilute limit surprisingly depended on the blend partner.

Original languageEnglish (US)
Article number037801
JournalPhysical review letters
Volume103
Issue number3
DOIs
StatePublished - Aug 6 2009

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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