ROLE OF SULFURIC-ACID IN THE PROCESS OF G RAFT-COPOLYMERIZATION OF ACRYLIC-ACID ON A HYDROPHOBIC MATRIX

The role of sulfuric acid in the graft copolymerization process was in vestigated on ozonized organosilicon matrices and polyethylene. It was shown, that the different behavior of sulfuric acid on the reaction r ate and the degree of grafting is determined by the ratio of iron II, used as a coinitiator of the reaction, and peroxides which are formed by the activation of the polymeric films. Sulfuric acid increases the graft copolymerization reaction rate if this ratio is close to one and decreases it if there is a surplus of iron. The distribution of the g rafted copolymer throughout the matrix volume can be regulated by vary ing the acidity of the medium.