Graft Copolymerization with a New Class of Acidic Peroxo Salt IV. Grafting of Acrylamide onto Jute Fiber Using Potassium Monopersulphate: Catalyzed by Fe(II)

Abstract

ABSTRACT:Graft copolymerization of acrylamide (AM) onto jute fibers has been studied in aqueous solution using a new class of acidic peroxosalt "potassium monopersulphate" as the initiator, under the catalytic influence of Fe(II) in a nitrogen atmosphere. It was observed that the graft yield was influenced by the reaction time, temperature, and concentration of the monomer, initiator, and base polymer. The grafting reaction has also been studied in the presence of a number of salts and organic solvents. The maximum graft yield (75.3%) was observed at 25°C at the concentrations of monomer (1.2 M), initiator (12.9 x 10-3 M), and catalyst (1.0 x 10-3 M) for a reaction time of 4 hours. From the experimental results a suitable mechanism for graft initiation and termination has been suggested.

Dyeing and thermal behavior of jute fibre grafted with nitrile monomer

“…The graft yield increased with the increase of monomer concentration for both AN and MAN. After a certain value, it decreased with a further increase in the monomer concentration (Samal et al 1986(Samal et al , 1989. The latter is due to the increasing homopolymerization rate rather than to grafting at the higher monomer concentration.…”

Graft copolymerization onto wool fibers: Grafting of acrylamide onto wool fibers initiated by potassium monopersulphate/Fe (II) redox system

“…The complete inhibition of grafting with morpholine may be due to ( i ) exhaustive oxidation of the additive predominating overgrafting and ( ii) the inhibiting effect of morpholine N-oxides formed during the oxidation reaction. The ability of KHS05 in oxidizing cyclic amines to corresponding N-oxides has been recognized by Kennedy and Stock.66 Further the retardation and/or inhibition of grafting by these N-oxides has been recognized by Samal et al 55 and Kinoshata et al 67 The progressive retardation in the percent grafting with increase in the composition of acetic acid and formic acid may be due to the chain transferring ability of these solvents which cause ( i ) premature termination of the growing grafted chains and (ii) predominancy of homopolymerization by excess of these solvent radicals. Both of these factors adversely contribute to grafting.…”

Graft copolymerization of nitrile monomers onto sulfonated jute‐cotton blended fabric

“…The grafting sites, that is, cellulose macroradicals in the presence of vinyl monomers, induced grafting. 5,24 Another explanation is that a significant amount of graft formation occurred in the presence of KMnO 4 because a certain amount of MnO 2 deposited on the BSJCB fabric.…”