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Radical Polymerization of Vinyl Acetate and Methyl Methacrylate Using Organochromium Initiators Complexed with Macrocyclic Polyamines
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY
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Polyvinylacetate and polymethyl methacrylate with controlled molecular weights and narrow polydispersities 1.55-1.68 were prepared by radical polymerization using initiators based on redox systems benzoyl peroxide and CrOAC2 complexed by macrocyclic polyamines, in THF, at ambient temperatures. Structure of N-based ligands affects the initiation rate and propagation control. The highest degree of control was achieved by using chromium atom complexed by 1,4,7,10,13,16-hexaazacyclooctadecane trisulfate.
APPROVED FOR PUBLIC RELEASE