Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 40513
Title Nonselective adsorption of block copolymers and the effect of block incompatibility.
Author(s) Bijsterbosch, H.D.; Cohen Stuart, M.A.; Fleer, G.J.; Caeter, P. van; Goethals, E.J.
Source Macromolecules 31 (1998). - ISSN 0024-9297 - p. 7436 - 7444.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 1998
Abstract The adsorbed amount and the hydrodynamic layer thickness of two series of block copolymers and the corresponding homopolymers on silica were determined. We used diblock copolymers of poly(vinyl methyl ether) and poly(2-ethyl-2-oxazoline) and tri- and diblock copolymers of poly(2-methyl-2-oxazoline) and poly(ethylene oxide). The diblock copolymers of poly(ethylene oxide) and poly(2-methyl-2-oxazoline) were obtained by polymerization of 2-methyl-2-oxazoline initiated by the tosylate of poly(ethylene glycol) monomethyl ether. The difference between the adsorption energies of the segments is found to be small: the block copolymer adsorption is nonselective. The adsorbed amount as a function of block copolymer composition shows a maximum at a composition where the longest block is also the strongest adsorbing block. The adsorbed amounts and the layer thicknesses are relatively low. Similar results are obtained with numerical self-consistent field calculations for nonselective adsorption for the case when the different blocks are incompatible. The typical anchor-buoy structure of the adsorbed layer is maintained, albeit less explicit than that found for selective adsorption.
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