Healing of adsorbed polymer layers in a narrow gap following removal by shear

Uri Raviv; Jacob Klein

doi:10.1002/pat.236

Healing of adsorbed polymer layers in a narrow gap following removal by shear

Uri Raviv^*, Jacob Klein

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The shear and normal forces between layers of poly(ethylene oxide) (PEO), of molecular weights M_w = 37 kg/mol adsorbed onto smooth, curved solid (mica) surfaces across the good solvent toluene have been determined using a surface force balance (SFB). The equilibrium F_n(D) profiles are closely similar to those measured in earlier studies between adsorbed PEO layers. The shearing motion causes the removal of polymer from within the intersurface gap during sliding. The recovery of the adsorbing layer has been measured and the amount of adsorption with time was calculated. Our findings showed that there is no migration of polymers on the surfaces and that the recovery of the layer is controlled by the rate of diffusion of polymer chains into the gap.

Original language	English
Pages (from-to)	1032-1038
Number of pages	7
Journal	Polymers for Advanced Technologies
Volume	13
Issue number	10-12
DOIs	https://doi.org/10.1002/pat.236
State	Published - 2002
Externally published	Yes

Keywords

Adsorbed polymers
Narrow gap
Poly(ethylene oxide)
Polymer diffusion
Surface forces

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10.1002/pat.236

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abstract = "The shear and normal forces between layers of poly(ethylene oxide) (PEO), of molecular weights Mw = 37 kg/mol adsorbed onto smooth, curved solid (mica) surfaces across the good solvent toluene have been determined using a surface force balance (SFB). The equilibrium Fn(D) profiles are closely similar to those measured in earlier studies between adsorbed PEO layers. The shearing motion causes the removal of polymer from within the intersurface gap during sliding. The recovery of the adsorbing layer has been measured and the amount of adsorption with time was calculated. Our findings showed that there is no migration of polymers on the surfaces and that the recovery of the layer is controlled by the rate of diffusion of polymer chains into the gap.",

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AU - Klein, Jacob

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N2 - The shear and normal forces between layers of poly(ethylene oxide) (PEO), of molecular weights Mw = 37 kg/mol adsorbed onto smooth, curved solid (mica) surfaces across the good solvent toluene have been determined using a surface force balance (SFB). The equilibrium Fn(D) profiles are closely similar to those measured in earlier studies between adsorbed PEO layers. The shearing motion causes the removal of polymer from within the intersurface gap during sliding. The recovery of the adsorbing layer has been measured and the amount of adsorption with time was calculated. Our findings showed that there is no migration of polymers on the surfaces and that the recovery of the layer is controlled by the rate of diffusion of polymer chains into the gap.

AB - The shear and normal forces between layers of poly(ethylene oxide) (PEO), of molecular weights Mw = 37 kg/mol adsorbed onto smooth, curved solid (mica) surfaces across the good solvent toluene have been determined using a surface force balance (SFB). The equilibrium Fn(D) profiles are closely similar to those measured in earlier studies between adsorbed PEO layers. The shearing motion causes the removal of polymer from within the intersurface gap during sliding. The recovery of the adsorbing layer has been measured and the amount of adsorption with time was calculated. Our findings showed that there is no migration of polymers on the surfaces and that the recovery of the layer is controlled by the rate of diffusion of polymer chains into the gap.

KW - Adsorbed polymers

KW - Narrow gap

KW - Poly(ethylene oxide)

KW - Polymer diffusion

KW - Surface forces

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ER -

Healing of adsorbed polymer layers in a narrow gap following removal by shear

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Keywords

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