International. As part of the research work for the elaboration of polymeric materials for protection against corrosion of metal, French researchers have developed a new family of polymers containing phosphonic acid.
The synthesis and characterization of polysulfones carrying alkyl phosphonate ester side groups were first described. These polymers are synthesized by direct polycondensation of a bisphenol containing phosphonate ester by aromatic nucleophilic substitution.
Acid hydrolysis of phosphonate esters results in the formation of phosphonic acid groups. Therefore, a series of polysulfones containing phosphonic acid is obtained and characterized. A preliminary assessment of the anticorrosive properties of these polymers is described. In a 0.25M Na2SO4 solution, the corrosion rate of a polymer-coated carbon steel sample is much lower than that of the metal-free substrate. These results suggest that polysulfones containing phosphonic acid could be interesting as anticorrosive coatings.
The study is published in: Journal of Applied Polymer Science, Volume 132, Issue 17, May 5, 2015
