Grafting Vinyl Monomers onto Chemically Modified Wool Fibers: Graft Copolymerization of Methyl Methacrylate onto Reduced Wool Fibers Using Acetylacetonate Complex of Manganese(III)

Abstract The graft copolymerization of methyl methacrylate (MMA) onto reduced Indian Chokla wool fibers was studied in aqueous solution using the acetylacetonato complex of Mn(III) as the initiator. Perchloric acid was found to catalyze the reaction. The rate of grafting was investigated by varying the concentration of the monomer and the complex, acidity of the medium, the temperature, and the reaction medium. It is observed that the graft yield increases with increasing concentration of the chelate and acid and with increasing temperature. There is an increase in graft yield within a certain concentration range of the monomer, after which it falls. The grafting is considerably influenced by changing the solvent composition of the reaction medium. A comparative study reveals that oxidized and reduced wools are better substrates than untreated and other chemically modified wools. The effect of various monomers on graft yield is investigated. MMA is found to be a most active monomer compared to other vinyl...

[1]  S. Lenka,et al.  Grafting vinyl monomers onto nylon-6. VII. Graft copolymerization of methyl methacrylate onto nylon-6 fibers with acetylacetonate complex of vanadium ion , 1982 .

[2]  Rakesh Sharma,et al.  Grafting onto wool, XVII. Graft copolymerization of methyl acrylate and ethyl acrylate by use of VO(acac)2 as initiator. Comparison of monomer reactivities , 1982 .

[3]  A. Hebeish,et al.  Graft copolymerization of vinyl monomers on modified cottons. XVIII. Grafting of methyl methacrylate and acrylonitrile on cotton treated with N‐methylol crosslinking agents using tetravalent cerium as initiator , 1981 .

[4]  P. Nayak,et al.  Grafting Vinyl Monomers onto Wool Fibers. X. Graft Copolymerization of Methyl Methacrylate onto Wool Using Acetylacetonato Complex of Manganese(lII) , 1981 .

[5]  B. N. Misra,et al.  Grafting onto wool. XI. Graft copolymerization of poly(vinyl acetate) and poly(methyl acrylate) onto reduced wool in presence of potassium persulfate–ferrous ammonium sulfate (KPS—FAS) system as redox initiator , 1981 .

[6]  D. Das,et al.  Trivalent manganese chelate-initiated graft copolymerization of methyl methacrylate onto silk fibers† , 1981 .

[7]  J. Niezette,et al.  Graft polymerization of methyl methacrylate onto chemically modified wools using LiBr–K2S2O8 redox system as initiator , 1981 .

[8]  P. Nayak,et al.  Grafting vinyl monomers onto cellulose. III. Graft copolymerization of methyl methacrylate onto cellulose using acetylacetonato manganese(III) complex , 1981 .

[9]  M. Mishra,et al.  Grafting vinyl monomers onto wool fibers, IX. Graft copolymerization of methyl methacrylate onto wool using peroxydiphosphate‐cysteine redox system , 1980 .

[10]  B. N. Misra,et al.  Grafting onto Wool. IX. Graft Copolymerization of Vinyl Monomers by Use of Vanadium Oxyacetylacetonate as Initiator , 1980 .

[11]  A. Hebeish,et al.  Wool graft copolymers initiated by azobisisobutyronitrile , 1973 .

[12]  H. Needles,et al.  Modification of the Properties of Wool Through Internal Deposition of Polymers , 1972 .

[13]  I. Watt.  Copolymers of Naturally Occurring Macromolecules , 1970 .

[14]  W. Gabara,et al.  Grafting in reaction of polyethylene and poly(maleic anhydride) , 1967 .

[15]  W. Gabara,et al.  Grafting of maleic anhydride on polyethylene. I. Mechanism of grafting in a heterogeneous medium in the presence of radical initiators , 1967 .

[16]  J. R. Casley-Smith.  THE BROWNIAN MOVEMENTS OF PINOCYTIC VESICLES. , 1964, Journal. Royal Microscopical Society.

[17]  R. Heitmiller,et al.  Single‐point determination of intrinsic viscosity , 1963 .

[18]  E. Arnett,et al.  Destructive Autoxidation of Metal Chelates. III. Effects of Additives on the Reaction. Metal Acetylacetonates as Radical Sources , 1962 .

[19]  M. Lipson.  A New Method for Forming Vinyl Polymers in Wool , 1949, Nature.