Accession Number:

ADA280828

Title:

Radical Polymerization of Vinyl Acetate and Methyl Methacrylate Using Organochromium Initiators Complexed with Macrocyclic Polyamines

Descriptive Note:

Technical rept.

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY

Personal Author(s):

• Mardare, Daniela
• Gaynor, Scott
• Matyjaszewski, Krzysztof

Report Date:

1994-06-30

Pagination or Media Count:

4.0

Abstract:

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.

Descriptors:

• *METHYL RADICALS
• *POLYMERIZATION
• *ORGANOMETALLIC COMPOUNDS
• *AMINES
• *CHROMIUM
• *VINYL RADICALS
• *CHEMICAL RADICALS
• *ACETATES
• *METHACRYLATES
• CONTROL
• PROPAGATION
• STRUCTURES
• PEROXIDES
• CLEAVAGE
• OXIDATION REDUCTION REACTIONS
• FREE RADICALS
• LIGANDS
• REVERSIBLE
• ATOMS
• RATES
• MOLECULAR WEIGHT
• TEMPERATURE
• COMPLEX COMPOUNDS

Subject Categories:

• Inorganic Chemistry
• Organic Chemistry
• Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE