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Interactions between Surfaces in Polydisperse Semiflexible Polymer Solutions

Woodward, Clifford E. and Forsman, Jan LU (2009) In Macromolecules 42(19). p.7563-7570
Abstract
We generalize a recently developed polymer density functional theory (PDFT) for polydisperse polymer fluids to the case of semiflexible (stiff) polymers. As with our earlier work on flexible polymers, we show here that the generalization of the PDFT to polydisperse: mixtures of semiflexible chains allows us to obtain a remarkable simplification of the solution algorithm, compared to the monodispersed case. The number of required equations for complete solution of the (polydisperse) PDFT scales inveresly with the width of the polydispersity profile. This reflects the fact that more information is required, the narrower is the polydispersity. We apply the theory to a number of model scenarios, including repulsive and adsorbing surfaces. We... (More)
We generalize a recently developed polymer density functional theory (PDFT) for polydisperse polymer fluids to the case of semiflexible (stiff) polymers. As with our earlier work on flexible polymers, we show here that the generalization of the PDFT to polydisperse: mixtures of semiflexible chains allows us to obtain a remarkable simplification of the solution algorithm, compared to the monodispersed case. The number of required equations for complete solution of the (polydisperse) PDFT scales inveresly with the width of the polydispersity profile. This reflects the fact that more information is required, the narrower is the polydispersity. We apply the theory to a number of model scenarios, including repulsive and adsorbing surfaces. We find that polydispersity effects on the depletion interaction are larger for dilute solutions and when the Surfaces arc adsorbing. We also investigate short, stiff chains and find rather dramatic effects in the presence of adsorbing surfaces. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
42
issue
19
pages
7563 - 7570
publisher
The American Chemical Society
external identifiers
  • wos:000270461600043
  • scopus:70350014972
ISSN
0024-9297
DOI
10.1021/ma901111w
language
English
LU publication?
yes
id
e949b4ad-529b-4af1-a009-efcc5d52b491 (old id 1489523)
date added to LUP
2009-10-22 11:42:43
date last changed
2017-01-01 04:59:15
@article{e949b4ad-529b-4af1-a009-efcc5d52b491,
  abstract     = {We generalize a recently developed polymer density functional theory (PDFT) for polydisperse polymer fluids to the case of semiflexible (stiff) polymers. As with our earlier work on flexible polymers, we show here that the generalization of the PDFT to polydisperse: mixtures of semiflexible chains allows us to obtain a remarkable simplification of the solution algorithm, compared to the monodispersed case. The number of required equations for complete solution of the (polydisperse) PDFT scales inveresly with the width of the polydispersity profile. This reflects the fact that more information is required, the narrower is the polydispersity. We apply the theory to a number of model scenarios, including repulsive and adsorbing surfaces. We find that polydispersity effects on the depletion interaction are larger for dilute solutions and when the Surfaces arc adsorbing. We also investigate short, stiff chains and find rather dramatic effects in the presence of adsorbing surfaces.},
  author       = {Woodward, Clifford E. and Forsman, Jan},
  issn         = {0024-9297},
  language     = {eng},
  number       = {19},
  pages        = {7563--7570},
  publisher    = {The American Chemical Society},
  series       = {Macromolecules},
  title        = {Interactions between Surfaces in Polydisperse Semiflexible Polymer Solutions},
  url          = {http://dx.doi.org/10.1021/ma901111w},
  volume       = {42},
  year         = {2009},
}