Reference : Effectiveness of block copolymers as stabilizers for aqueous titanium dioxide dispersion...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/16075
Effectiveness of block copolymers as stabilizers for aqueous titanium dioxide dispersions of a high solid content
English
Creutz, Serge [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Depatment of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Dec-2000
Progress in Organic Coatings
Elsevier Science
40
1-4
21-29
Yes (verified by ORBi)
International
0300-9440
Lausanne
Switzerland
[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.
Center for Education and Research on Macromolecules (CERM)
Akzo Nobel Coatings Technology Center ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/16075
10.1016/S0300-9440(00)00145-4
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
The authors acknowledge Progress in Organic Coatings (Elsevier) for allowing them to archive this paper.

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