Grafting vinyl monomers onto cellulose. VII. Graft copolymerization of methyl methacrylate onto cellulose using acetylacetonato cobalt(III) complex

✍ Scribed by Subasini Lenka; Atanu K. Tripathy

• Publisher: John Wiley and Sons
• Year: 1982
• Tongue: English
• Weight: 224 KB
• Volume: 27
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1982.070270544

✦ Synopsis

Grafting Vinyl Monomers onto Cellulose. VII. Graft Copolymerization of Methyl Methacrylate onto Cellulose Using Acetylacetonato Cobalt( HI) Complex

The use of chelate complexes for initiating vinyl polymerization has attracted attention in recent

It has been predicted that the initiation process is essentially the scission of a ligand to generate a free radical by the reduction of the metal to a lower valency state. The ability of certain metal chelates to produce free radicals when heated was first pointed out by Arnett and Mendelsohn3 in the course of investigation on the oxidation of these compounds. Kasting e t al.lss reported that the simple acetylacetonate of Mn(II1) and Co(II1) are most active initiators. Bamford and Lind' reported the polymerization of vinyl monomers using manganicacetylacetonate complexes. Otsu et al.539 have studied the polymerization of some vinyl monomers using a large number of metal acetylacetonate. Recently, we reported the vinyl polymerization and graft copolymerization using acetylacetonato manganese(II1) complex as the initiator.lOJ1

This communication presents the kinetics and mechanism of graft copolymerization of methyl methacrylate onto cellulose using acetylacetonato cobalt(II1) complex.