An amphoteric water-soluble copolymer. II. Effect of its molecular weight on the dispersion of barium titanate in water

Kuo Liang Ying, Kung Chung Hsu, Wen Cheng J. Wei

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3 Citations (Scopus)


An amphoteric water-soluble copolymer, that is, polyacrylamide/(α-N,N-dimethyl-N-acryloyloxyethyl)ammonium ethanate (PAAM/DAAE) was synthesized and it showed the ability to disperse BaTiO 3 (BT) particles in aqueous solutions. In this work, the effect of molecular weight of this polymer on the dispersing properties was further examined. The results indicate that the effectiveness of three polymer samples with different molecular weights in the dispersion of BT particles is P2 (M w = 1.1 × 105) > P1 (Mw = 1.2 × 104) > P3 (Mw = 3.0 × 105). Apparently, P2 is most effective in dispersing the particles, reducing the viscosity of the suspensions, and obtaining highest green and sintered densities. This is attributed to the highest adsorption of this polymer onto BT powder, and causes strongest electrostatic and steric repulsions.

Original languageEnglish
Pages (from-to)886-891
Number of pages6
JournalJournal of Applied Polymer Science
Issue number2
Publication statusPublished - 2006 Apr 15



  • Adsorption
  • BaTiO
  • Dispersion
  • Molecular weight

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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