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Titolo:
Depletion and bridging forces in polymer systems: Monte Carlo simulations at constant chemical potential
Autore:
Broukhno, A; Jonsson, B; Akesson, T; Vorontsov-Velyaminov, PN;
Indirizzi:
Univ Lund, S-22100 Lund, Sweden Univ Lund Lund Sweden S-22100Univ Lund, S-22100 Lund, Sweden SPbSU, Fac Phys, Petrodvoretz 198904, Russia SPbSU Petrodvoretz Russia 198904 , Fac Phys, Petrodvoretz 198904, Russia
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 13, volume: 113, anno: 2000,
pagine: 5493 - 5501
SICI:
0021-9606(20001001)113:13<5493:DABFIP>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRIC DOUBLE-LAYER; LIPID BILAYERS; PLANAR SLITS; FREE-ENERGY; ADSORPTION; ATTRACTION; REPULSION; SURFACES; MIXTURES; SPHERE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Broukhno, A Univ Lund, POB 124, S-22100 Lund, Sweden Univ Lund POB 124 Lund Sweden S-22100 4, S-22100 Lund, Sweden
Citazione:
A. Broukhno et al., "Depletion and bridging forces in polymer systems: Monte Carlo simulations at constant chemical potential", J CHEM PHYS, 113(13), 2000, pp. 5493-5501

Abstract

A new Monte Carlo simulation method designed for polymer solutions confined to planar slits is presented. The slit is in equilibrium with a surrounding bulk solution and the method allows a variation of the slit width while maintaining the polymer chemical potential constant. This is achieved by changing the tangential pressure as a function of slit width. An analysis of chain parameters and monomer distribution within the slit has been carried out. The model system used is supposed to mimick a macromolecular solution whose stability is manipulated by addition of adsorbing and/or nonadsorbingpolymers. Generally, for the nonadsorbing polymer an attractive depletion force is found. At high volume fractions the attraction is reduced and a repulsive force appears at short separations. The depletion force can also beextinguished in the case of an adsorption potential of intermediate strength, while strong adsorption gives rise to a significant attraction due to polymer bridges. (C) 2000 American Institute of Physics. [S0021-9606(00)50237-2].

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Documento generato il 25/11/20 alle ore 10:28:07