Kompanets M. Oxygenation and polymerization of vinyl monomers in the presence of N-hydroxyphthalimide

The thesis is deals with the study of the mechanism of N-hydroxyphthalimide (NHPI) influence on the oxidation and polymerization of vinyl monomers for optimization of polymeric material synthesis and improving their both physical and chemical properties. In the course of investigation it has been shown that NHPI exhibit the initiator properties in polymerization and oxidation of monomers (methylmethacrylate, acrylonitrile, styrene, alpha-methylstyrene). It was shown that initiation stage implies molecular complexes formation. NHPI or its derivatives complexation with methylmethacrylate and reactive macroradical caused the formation of suitable conditions for syndiotactic macromolecules synthesis with syndiotactic dyad content more than 80%. It could be deduced from rate constants analysis, that phthalimide-N-oxyl radical has distinct electrophilic character in addition to double bond reaction. Monomer reactivity in this elementary stage decreased in order: СН2=С(СН3)С6Н5, СН2=СНС6Н5, СН2=С(СН3)СООСН3, СН2=СНСООСН3, СН2=СНCN..