Polymers near a solid surface. Fused hard sphere chain model
✍ Scribed by E. Vakarin; Yu. Duda; M.F. Holovko
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 726 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0167-7322
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✦ Synopsis
Density profiles and adsorption coefficient of a fused hard sphere chain fluid near a hard wail are studied using the polymer PY approximation for the associative Henderson-Abraham-Barker equation. Adsorption of polymer chains onto an adhesive wall is considered and discussed. The chain molecule is represented to be formed by b.ard sphere beads with two independent attractive sites displaced inside the hard core. The beads adjacent within a given chain penetrate each other at a distance L between their centres. The wall-particle correlation functions are given both numerically and analytically (as the Laplace transform) as functions of bulk number density 77, mean chain length m and bond length L. Dependence of the interracial structure on the bond length L is investigated. The results indicate that with increasing density and elongation L the paralel orientation of the chains adjacent to the wall is more probable. The appearence of the second adlayer with increasing adhesion is displayed. It is shown that increasing of the intramolecular correlations induces a high coverage of adhesive surface at low bulk densities.