Effect of associating polymer on the dispersion stability and rheology of suspensions

  • Otsubo, Yasufumi (Department of Urban Environment System, Faculty of Engineering, Chiba University) ;
  • Horigome, Misao (Central Research Laboratories, Dainippon Ink and Chemicalls, Inc.)
  • Published : 2003.03.01


Associating polymers are hydrophilic long-chain molecules to which a small amount of hydrophobic groups (hydrophobes) is incorporated. In aqueous solution, the association interactions result in the formation of three-dimensional network through flowerlike micelles at high concentrations. In colloidal suspensions, the associating polymers act as flocculated by bridging mechanism. The rheological properties of suspensions flocculated by associating polymers end-capped with hydrophobes are studied in relation to the bridging conformation. At low polymer concentrations, the polymer chains effectively form bridges between particles by multichain association. The suspensions are highly flocculated and show typical viscoelastic responses. When the polymer concentration is increased above the absorbance at saturation, the excess polymer chains remaining in the solution phase build up three-dimensional network by associating interactions. Since the presence of particles does not significantly influence the network structures in the medium, the relative viscosity, which gives a measure of the degree of flocculation is decreased with increasing polymer concentration. The bridging conformation and flocculation level vary strongly depending on the polymer concentrations.



  1. J. Rheol v.37 The rheology of solutions of associating polymers: comparison of experimental behavior with transient network theory Annable, T.;R. Bucall;R. Ettelaie;D. Whittlestone https://doi.org/10.1122/1.550391
  2. J. Colloid Interface Sci. v.46 Polymer adsorption and its effect on the stability of hydrophobic colloids Fleer, G. J.;J. Lyklema https://doi.org/10.1016/0021-9797(74)90018-6
  3. J. Soc. Rheol. Japan v.26 Rheological behavior of PMMA powder/associating polymer suspensions Horigome, M.;M. Yada;T. Isoda https://doi.org/10.1678/rheology1973.26.3_157
  4. Langmuir v.18 Long-time relaxation of suspensions flocculated by associating polymers Horigome, M.;Y. Otsubo https://doi.org/10.1021/la010943p
  5. J. Colloid Interface Sci. v.37 Relation of particle size of colloidal silica to the amount of a cationic polymer required for flocculation and surface coverage Iler, R. K. https://doi.org/10.1016/0021-9797(71)90304-3
  6. ACS Symp. Ser. v.462 Steady-shear and linear-viscoelastic material properties of model associative polymer solutions Jenkins, R. D.;C. A. Silebi;M. S. El-Aasser https://doi.org/10.1021/bk-1991-0462.ch013
  7. Langmuir v.16 Effect of surfactant on the viscoelastic behavior of semidilute solutions of multisticker associating polyacrylamieds Jimenez-Regalado, E.;J. Selb;F. Candau https://doi.org/10.1021/la000168y
  8. Langmuir v.6 Elastic percolation in suspensions flocculated by polymer bridging Otsubo, Y. https://doi.org/10.1021/la00091a016
  9. Langmuir v.7 Simulation of bridging flocculation and elastic percolation in suspensions Otsubo, Y. https://doi.org/10.1021/la00054a017
  10. J. Colloid Interface Sci. v.122 Effect of polymer bridging on the flow behavior of silica suspensions Otsubo, Y.;K. Watanabe https://doi.org/10.1016/0021-9797(88)90370-0
  11. J. Rheol. v.42 The effects of adsorbed layers and solution polymer on the viscosity of dispersions containing associative polymers Pham, Q. T.;W. B. Russel;W. Lau https://doi.org/10.1122/1.550934
  12. Macromolecules v.32 Micellar solutions of associative triblock coploymers: the relationship between structure and rheology Pham, Q. T.;W. B. Russel;J. C. Thibeault;W. Lau https://doi.org/10.1021/ma990215x
  13. Macromolecules v.23 A one-component model for the phase behavior of dispersions containing associative polymers Santore, M. M.;W. B. Russel;R. K. Prudhomme https://doi.org/10.1021/ma00218a018
  14. Faraday Discuss. Chem. Soc. v.90 Experimental and theoretical study of phase transitions induced in colloidal dispersions by associative polymers Santore, M. M.;W. B. Russel;R. K. Prudhomme https://doi.org/10.1039/dc9909000323
  15. Adv. Org. Coatings Sci. Technol. v.9 Flocculation and rheological characteristics of mixtures of lattices and water-soluble polymeric thickeners Sperry, P. R.;J. C. Thibeault;E. C. Kastanek
  16. Colloid Polym. Sci. v.274 Effects of nonionic surfactant and associative thickener on the rheology of polyacrylamide in aqueous glycerol solutions Wang, L.;C. Tiu;T.-J. Liu https://doi.org/10.1007/BF00663445