Density functional study of surface forces in solutions containing star-shaped polymers
(2004) In Macromolecules 37(18). p.7034-7041- Abstract
- Density functional theory is used to study polymer solutions between surfaces in equilibrium with a bulk solution. We investigate the effect on the surface interaction free energy of having star polymers with different numbers of arms. In addition, we consider the role played by the strength of the adsorption potential and the concentration of the polymer molecules. The interaction free energy is found to scale quite well with the number of arms on the stars, and the separation dependence of the interaction scales approximately with the radius of gyration. When the adsorption potential is weak, the polymer molecules are depleted. A free energy barrier is nevertheless present-a phenomenon often referred to as depletion stabilization. The... (More)
- Density functional theory is used to study polymer solutions between surfaces in equilibrium with a bulk solution. We investigate the effect on the surface interaction free energy of having star polymers with different numbers of arms. In addition, we consider the role played by the strength of the adsorption potential and the concentration of the polymer molecules. The interaction free energy is found to scale quite well with the number of arms on the stars, and the separation dependence of the interaction scales approximately with the radius of gyration. When the adsorption potential is weak, the polymer molecules are depleted. A free energy barrier is nevertheless present-a phenomenon often referred to as depletion stabilization. The barrier scales with the number of arms on the star polymers. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/139605
- author
- Woodward, C E and Forsman, Jan LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Macromolecules
- volume
- 37
- issue
- 18
- pages
- 7034 - 7041
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000223677600054
- scopus:4544224332
- ISSN
- 0024-9297
- DOI
- 10.1021/ma035508b
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Theoretical Chemistry (S) (011001039)
- id
- 25a01af9-1272-4a27-a2b1-5be572610d90 (old id 139605)
- date added to LUP
- 2016-04-01 11:57:57
- date last changed
- 2023-01-03 01:53:26
@article{25a01af9-1272-4a27-a2b1-5be572610d90,
abstract = {{Density functional theory is used to study polymer solutions between surfaces in equilibrium with a bulk solution. We investigate the effect on the surface interaction free energy of having star polymers with different numbers of arms. In addition, we consider the role played by the strength of the adsorption potential and the concentration of the polymer molecules. The interaction free energy is found to scale quite well with the number of arms on the stars, and the separation dependence of the interaction scales approximately with the radius of gyration. When the adsorption potential is weak, the polymer molecules are depleted. A free energy barrier is nevertheless present-a phenomenon often referred to as depletion stabilization. The barrier scales with the number of arms on the star polymers.}},
author = {{Woodward, C E and Forsman, Jan}},
issn = {{0024-9297}},
language = {{eng}},
number = {{18}},
pages = {{7034--7041}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Macromolecules}},
title = {{Density functional study of surface forces in solutions containing star-shaped polymers}},
url = {{http://dx.doi.org/10.1021/ma035508b}},
doi = {{10.1021/ma035508b}},
volume = {{37}},
year = {{2004}},
}