Low molecular weight poly(acrylic acid) with nitrilodi(methylenephosphonic acid) chain ends for scale inhibition

Akar A., Oz N.

ANGEWANDTE MAKROMOLEKULARE CHEMIE, vol.273, pp.12-14, 1999 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 273
  • Publication Date: 1999
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.12-14
  • Istanbul Technical University Affiliated: No


Poly(acrylic acid) with molecular weight of 5000 was produced by using 2-aminoethanethiol hydrochloride as chain transfer agent. Amine chain end groups of the resulting polyacrylic acid were transfer med into nitrilodi(methylenephosphonic acid) by reacting formaldehyde-phosphorous acid in the presence of hydrogen chloride. H-1 NMR, P-31 NMR and microanalysis were used for structural analysis. The modified polyacrylic acid had much better calcium carbonate scale inhibition effect than commercial poly(acrylic acid).