Graft copolymerization of acrylonitrile onto jute fibers (studies on Ce(IV)‐hippuric acid redox system)

Abstract

SynopsisGraft copolymerization of acrylonitrile (AN) onto chemically modified bleached jute fibers was studied using Ce(1V)-hippuric acid redox initiator system. The effects of time, temperature, concentration of monomer (AN), metal ion (Ce4+), hippuric acid, sulfuric acid, and amount of jute fiber on graft yield have been studied. The effects of some organic solvents and inorganic salts on graft yield have also been studied. Infrared spectra of chemically modified bleached jute and grafted jute have been taken and their characteristic bands have been identified. More than 90% graft yield could be achieved with the present system.

Studies on grafting of cellulosic materials isolated fromAgave lechuguilla andfourcroydes

“…As shown in Fig. 2 graft yield increases steadily with increase of reaction time up to 6 h. Thus the highest graft yield is obtained within 6 h. These observations are similar to those observed by Patnaik et al 7) and Huque et al 18) who report ceric ion-initiated grafting of acrylonitrile and methyl methacrylate, respectively, onto jute fibers.…”

“…Patra and Singh studied the optimum conditions of graft polymerization of acrylo-nitrile and methyl methacrylate onto purified jute fibers 5) . Also much research has been done on graft copolymerization of acrylonitrile onto pineapple leaf fibers 6) , purified jute fibers 7,8) and cotton 9) using redox initiator as, e. g., Ce(IV)/Fe(NH 4 )(SO 4 ) 2 , Ce(IV)/hippuric acid, KMnO 4 / thioacetamide, and IO 4 -/CuSO 4 . Oxidation of alcohol and glycol groups involving free radicals has been used to develop a technique of graft copolymerization onto starch and cellulose.…”

Graft copolymerization of methyl methacrylate onto biomedical polyvinyl chloride initiated by Ce(IV)–glucose redox system

“…The growth in graft yield with increase in concentration of methyl methacrylate might be due to the formation of a higher number of radicals (PM N ), which in turn might generate more grafting sites on polyvinyl chloride. The decreasing trend in graft yield after certain concentrations of the monomer might be due to the competition between homopolymerization and grafting, where the former prevailed over the latter at higher monomer concentrations 28, 29…”

Study on the mechanical and dielectric properties of photocured jute fabrics with 2‐hydroxyethyl methacrylate

“…The degradation character of the composite was also studied. Modification of jute by grafting was reported by Varma et al 3 Moisture absorption of jute fibers could be reduced significantly by treatment with graft copolymerization using methyl methacrylate (MMA). The tensile strength and elongation at break of jute fiber decreased on grafting whereas the initial modulus increased with increasing percentage of grafting.…”