Effectiveness of block copolymers as stabilizers for aqueous titanium dioxide dispersions of a high solid content

Creutz, Serge; Jérôme, Robert

doi:10.1016/S0300-9440(00)00145-4

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Effectiveness of block copolymers as stabilizers for aqueous titanium dioxide dispersions of a high solid content

Creutz, Serge; Jérôme, Robert

2000 • In Progress in Organic Coatings, 40 (1-4), p. 21-29

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/16075

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10.1016/S0300-9440(00)00145-4

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Abstract :

[en] Copolymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and sodium methacrylate (MANa) have been synthesized and tested as dispersants for the aqueous dispersion of titanium dioxide (80 wt.% solid). The molecular composition of the block copolymers has an effect on the dispersion stability. Triblock copolymers consisting of PMANa outer blocks are unable to stabilize the dispersion. Triblock copolymers of the reverse structure form poorly stable dispersions due to at least partial particle bridging. In the case of non-blocky distribution of the DMAEMA and MANa comonomers in the chains, the stabilization capability is lost. A decrease in the anchoring strength of the diblocks has a deleterious effect on the dispersion stability. Finally, the surface coverage depends on the availability of free copolymer chains (unimers) coexisting with micelles. These trends have been confirmed in a fully formulated paint containing Cu-phthalocyanine pigment.

Research center :

Center for Education and Research on Macromolecules (CERM)

Disciplines :

Materials science & engineering
Chemistry

Author, co-author :

Creutz, Serge; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Jérôme, Robert ; Université de Liège - ULiège > Depatment of Chemistry > Center for Education and Research on Macromolecules (CERM)

Language :

English

Title :

Effectiveness of block copolymers as stabilizers for aqueous titanium dioxide dispersions of a high solid content

Publication date :

December 2000

Journal title :

Progress in Organic Coatings

ISSN :

0300-9440

Publisher :

Elsevier Science, Lausanne, Switzerland

Volume :

Issue :

1-4

Pages :

21-29

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6THD-41WSBJW-3-12&_cdi=5280&_user=532038&_orig=browse&_coverDate=12%2F31%2F2000&_sk=999599998&view=c&wchp=dGLbVlz-zSkWA&md5=0efcce22f0d4f2a4d2872485cd744179&ie=/sdarticle.pdf
http://www.elsevier.com/wps/find/journaldescription.cws_home/504100/description#description

Funders :

Akzo Nobel Coatings Technology Center
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique

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