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Alumina interaction with AMPS–MPEG copolymers produced by RAFT polymerization: Stability and rheological behavior by H. Bouhamed; S. Boufi; A. Magnin is a scholarly article available to read on EtoBox.

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Different copolymers of 2-acrylamido-2-methylpropanesulfonic acid sodium salt (AMPS), methoxypolyethyleneglycol methacrylate (MPEG), were prepared using two methods of radical polymerization: classical and RAFT-controlled radical polymerization. The effect of polymer structure and architecture on the adsorption behavior, electrokinetic and rheological properties of the alumina suspensions was investigated. Adsorption isotherms showed that copolymer interaction depended not only on the ratio of the monomers and their distribution within the macromolecular backbone, but also on the method of copolymerization. Electrokinetic analysis indicated that adsorption of the copolymer is accompanied by a shift in the isoelectric point (IEP) towards acid pH values. Above a certain concentration, of the order of 1 wt%, the absolute value of the zeta-potential reaches a saturation plateau. At this stage, the maximum zeta-potential value (in absolute value) depends on both the ratio of the monomers for statistical copolymer and the length of the two blocks in the case of block distribution. The rheological behavior is greatly affected in the presence of added polymer; the viscosity of the alumina

Author

H. Bouhamed; S. Boufi; A. Magnin

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2009

Language

EN