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Träfflista för sökning "WFRF:(Woodward C) srt2:(2005-2009)"

Search: WFRF:(Woodward C) > (2005-2009)

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  • Woodward, C. E., et al. (author)
  • Exact density functional theory for ideal polymer fluids with nearest neighbor bonding constraints
  • 2008
  • In: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 129:5
  • Journal article (peer-reviewed)abstract
    • We present a new density functional theory of ideal polymer fluids, assuming nearest-neighbor bonding constraints. The free energy functional is expressed in terms of end site densities of chain segments and thus has a simpler mathematical structure than previously used expressions using multipoint distributions. This work is based on a formalism proposed by Tripathi and Chapman [Phys. Rev. Lett. 94, 087801 (2005)]. Those authors obtain an approximate free energy functional for ideal polymers in terms of monomer site densities. Calculations on both repulsive and attractive surfaces show that their theory is reasonably accurate in some cases, but does differ significantly from the exact result for longer polymers with attractive surfaces. We suggest that segment end site densities, rather than monomer site densities, are the preferred choice of "site functions" for expressing the free energy functional of polymer fluids. We illustrate the application of our theory to derive an expression for the free energy of an ideal fluid of infinitely long polymers. (C) 2008 American Institute of Physics.
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