New Equilibrium Used in The Cobalt Mediated Controlled Radical Polymerization (CMCRP) of Vinyl Acetate

The controlled radical polymerization of vinyl acetate with cobalt acetoacetonate (Co(acac)2) and benzoyl peroxide initiator has been reported earlier[1]. We have also reportedthe stabilized radical polymerization of vinyl acetate in an amine mediated system yielding the molecular weightdistribution of 2.7[2]. In this work the CMCRP of vinylacetate was studied. The effect of oxygen, DMF and DMSO ligands, and AIBN or Bz2PO2 initiators have also been used tocontrol the yield with a linear relation of Ln[1/1-x] with time indicating a controlled radical polymerization. The catalystcomplex was adsorbed on the solid polyvinyl acetate powder to control the activity of Co(acac)2 catalyst with DMF ligand. We have used 1H NMR to study the structure of the polymers We have also extended our founding to a new system for CMCRP process of vinyl acetate