Irreversible adsorption from concentrated polymer solutions

Auvray, L.; Cruz, M. I.; Auroy, P.

doi:10.1051/jp2:1992191

Cited by 25 publications

(25 citation statements)

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“…Guiselin predicted that the resulting interfacial structure, which has come to be known as the "Guiselin brush," has a universal density profile, c(z) ∼ z −2/5 in good solvent. Neutron scattering [2,3] and neutron reflectivity [4,5] studies have indicated density profiles both consistent [3,5] and inconsistent [4] with this prediction.…”

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confidence: 93%

The slowly formed Guiselin brush

O’Shaughnessy

Vavylonis

2003

Europhys. Lett.

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We study polymer layers formed by irreversible adsorption from a polymer melt. Our theory describes an experiment which is a "slow" version of that proposed by Guiselin [Europhys. Lett., 17 (1992) 225] who considered instantaneously irreversibly adsorbing chains and predicted a universal density profile of the layer after swelling with solvent to produce the "Guiselin brush." Here we ask what happens when adsorption is not instantaneous. The classic example is chemisorption. In this case the brush is formed slowly and the final structure depends on the experiment's duration, t final . We find the swollen layer consists of an inner region of thickness z * ∼ t −5/3 final with approximately constant density and an outer region extending up to height h ∼ N 5/6 which has the same density decay ∼ z −2/5 as for the Guiselin case.

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confidence: 93%

The slowly formed Guiselin brush

O’Shaughnessy

Vavylonis

2003

Europhys. Lett.

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“…The conformations of adsorbed or grafted chains using neutron reflectivity has been extensively studied in particular by L. Auvray and co-workers [1][2][3][4][5][6] using neutron reflectivity. Neutron reflectivity also allowed to study their interactions with a solution [7][8][9] or other soft matter systems [10]. If the adsorbed polymer chains are long enough, they can entangle with the bulk chains and thus modify the mechanical coupling between the solid surface and the liquid.…”

Section: Introductionmentioning

confidence: 99%

Sensing adsorption kinetics through slip velocity measurements of polymer melts

et al. 2018

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The evolution over time of the nonlinear slip behavior of a polydimethylsiloxane (PDMS) polymer melt on a weakly adsorbing surface made of short non-entangled PDMS chains densely end-grafted to the surface of a fused silica prism has been measured. The critical shear rate at which the melt enters the nonlinear slip regime has been shown to increase with time. The adsorption kinetics of the melt on the same surface has been determined independently using ellipsometry. We show that the evolution of slip can be explained by the slow adsorption of melt chains using the Brochard-de Gennes's model.

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“…We assume that only polymer chains strongly adhered to the glass surface will remain on it after this procedure. The assumption is valid for cases in which the adsorption kinetics are fast in comparison to the diffusion of polymer chains in the solution; thus, the adsorption is irreversible and the initial chains are retained and adsorbed onto the surface [15,16].…”

Section: Step 5: Polymer Coated Glass Samplesmentioning

confidence: 99%