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Block Copolymers of Vinyl Ethers as Thermo‐Responsive Colloidal Stabilizers of Organic Pigments in Aqueous Media
Author(s) -
Bulychev Nikolay A.,
Arutunov Igor A.,
Zubov Vitali P.,
Verdonck Beatrice,
Zhang Tianzhu,
Goethals Eric J.,
Du Prez Filip E.
Publication year - 2004
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200400203
Subject(s) - copolymer , vinyl ether , amphiphile , polymer chemistry , colloid , polymer , living cationic polymerization , lower critical solution temperature , aqueous solution , chemistry , vinyl acetate , vinyl polymer , ether , materials science , chemical engineering , organic chemistry , engineering
Summary: The colloidal stability of the aqueous dispersions of hydrophobic organic pigments, CuPc and carbon black, stabilized by a wide range of polymer structures based on alkyl vinyl ethers was studied. It was shown that, unlike the homopolymers and the random copolymers, the amphiphilic AB, ABA and BAB block copolymers of MVE with IBVE or ODVE show stabilizing activities that depend on their hydrophilic/hydrophobic balance and polymer architecture. After optimization, the colloidal stabilization is competitive with commercial PEO‐PPO block copolymers (Pluronic®). It was found that the sedimentation of the dispersions was much faster at a higher temperature, above the LCST of the PMVE‐blocks. The loss of the stabilizing activity of the block copolymers correlates with an increase of the hydrophobicity of the treated pigment surface. These properties enable the creation of colloidal dispersions with stabilities that can be tuned as a function of temperature.Poly(methyl vinyl ether) ABA and BAB block copolymers as colloidal stabilizers of organic pigments.