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

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20 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

  • Physics and Astronomy(all)

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