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

✍ Scribed by Atanu K. Tripathy; Subasini Lenka; Padma L. Nayak

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 170 KB
• Volume: 26
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1981.070260430

✦ Synopsis

Grafting Vinyl Monomers onto Cellulose. III. Graft Copolymerization o f Methyl Methacrylate onto Cellulose Using Acetylacetonato Manganese( 111) Complex

Recently, attention has been paid to find new initiating systems of radical reactions based particularly on chelate complexes of transition

The initiating species are believed to be the ligand radicals formed, i.e., under homolytic scission of the metal-oxygen bond of metal acetylacetonates. At the same time, the formal valence of the metal is reduced by one which is confirmed by spectral and ESR measurement^.^ The efficiency of initiation of metal chelates could be enhanced by addition of various compounds, mainly halogen containing compounds2 and compounds of electron donating substances6 such as dioxane, dimethyl sulfoxide, etc. In the majority of the cases reported so far, the polymerization proceeds via a typical free radical process. Kasting et a1.2 reported the polymerization of MMA by Mn(acac):> halogen compounds.

Nayak e t aL7 reported grafting onto cellulose using Vs+ as the initiator. In the present investigation, the authors report the graft copolymerization of methyl methacrylate onto cellulose using an acetylacetonato manganese(II1) complex as the initiator.