Fractionation in a Phase-separated Polydisperse Polymer Mixture

A. van Heukelum, G.T. Barkema, M.W. Edelman, E. van der Linden

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

If a solution of polydisperse A- and B-polymers undergoes phase separation, the molar mass distribution of the A-polymers in the A-rich phase becomes different from that in the B-rich phase. This phenomenon is known as fractionation. Here, we compare experimental results on fractionation with Flory-Huggins theory and computer simulations. We study the degree of fractionation f(m) A in B(m)/A in A(m), in which A in A(m) is the density of A-polymers with molar mass m in the A-rich phase and A in B(m) that of A-polymers in the B-rich phase. We find that f(m) obeys the simple scaling f(m) ~ exp(-km), where k is a temperature-dependent constant.
Original languageEnglish
Pages (from-to)6662-6667
JournalMacromolecules
Volume36
Issue number17
DOIs
Publication statusPublished - 2003

Keywords

  • lattice multichain systems
  • time dynamic properties
  • flory-huggins model
  • spinodal decomposition
  • monte-carlo
  • entangled polymers
  • ising-model
  • blends
  • fluctuations
  • compatibility

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