Journal of Applied Polymer Science, Vol.60, No.13, 2321-2327, 1996
Structure of Poly(Acrylic Acid)-HF,Ti,Zr(IV) Chloride Gels and Their Potential Application in Dentistry
Poly(acrylic acid) [poly(polypropenoic acid)] (PAA) can form stable and insoluble, colorless hydrogels with HfCl4, TiCl4, and ZrCl4 in water. Two carboxylic groups of PAA are complexed by the M(OH)(2)(2+) ions. Hydrogels formed from PAA-MCl(2)(OH)(2) (where M = Hf, Zr) (2 : 1) have found practical application in the blocking of microscopic channels in tooth dentin, and thereby decrease the fluid permeability and protect against tooth decay.