Graft copolymerization of acrylic acid onto jute fibers initiated by quinquivalent vanadium

Samal, Rajani K.; Dash, Sabyasachi; Sahu, Abani K.

doi:10.1002/app.1990.070410117

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…The increase in retention capacity may be due to (1) the formation of hydrogen bonds between the nitrogen atom of vinyl pyridine ring and water molecules and (2) the fact that void formation is increased because of the increase in % grafting. This is in accordance with earlier reports 17, 18…”

Section: Resultssupporting

confidence: 94%

Free‐radical grafting of 4‐vinyl pyridine onto nylon 6 fiber

Anbarasan¹,

Johnsamuel

Sudha

et al. 2002

J of Applied Polymer Sci

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ABSTRACT:The chemistry of free-radical graft copolymerization initiated with peroxomonosulfate (PMS)-thioglycolic acid (TGA) redox system has been investigated by using 4-vinyl pyridine (4VP) as a model for nylon 6 fiber in aqueous solution under nitrogen atmosphere. Effects of concentration of 4VP, PMS, TGA, nylon 6, time, and temperature on R h and graft parameters were studied. The FTIR spectrum of nylon 6-g-4VP was reported. Water retention capacity (WRC) of the grafted fiber was tested.

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Section: Resultssupporting

confidence: 94%

Free‐radical grafting of 4‐vinyl pyridine onto nylon 6 fiber

Anbarasan¹,

Johnsamuel

Sudha

et al. 2002

J of Applied Polymer Sci

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“…Vinyl monomers have great potential to graft onto cellulose fiber using different initiation systems i.e., chemical, ionic and radical initiators. Among these initiation systems the chemical initiation of grafting involving oxidizing agents such as KMnO 4 , Na 2 S 2 O 3 , K 2 S 2 O 8 , Ce(IV), V(V) etc are promising from the economic point of view and quite selective in nature [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of okra bast fiber and its physico-chemical characteristics

et al. 2009

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The effect of chemical treatment i.e. bleaching, alkalization and graft copolymerization on the morphology changes of okra bast fiber has been investigated by means of infrared spectroscopy (IR), scanning electron microscopy (SEM), water absorption and tensile properties measurements. The graft copolymerization reaction of bleached fiber with acrylonitrile monomer (AN) has been carried out under the catalytic influence of K 2 S 2 O 8 and FeSO 4 redox system. The maximum graft yield (11.43 %) has been found at 70 o C temperature, 3×10 -2 mol/l acrylonitrile, 5×10 -3 mol/l K 2 S 2 O 8 , 5×10 -3 mol/ l FeSO 4 and for 90 min. On the contrary, the fiber has been treated with 10 % NaOH solution, which is much effective to remove the impurities. Based on findings of water absorption, tensile properties and SEM micrograph, the AN-grafted fiber has been showed better properties than bleached and alkali treated fibers. The degree of modification of okra bast fiber by chemical treatment has been evaluated by IR measurement.

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“…Polymerization was done with 40-110 % monomer, 1-6 % potassium persulfate as initiator, and 1-6 % ferrous sulfate as catalyst, based on the weight of the fiber, at 40-80 °C, for 30-150 min, in the fiber-liquor ratio of 1:30. At the end of the desired reaction period, the fibers were washed with hot distilled water (Sikdar et al 1995;Abou-Zeid et al 1984;Samal et al 1990). It was then extracted with acetone for 10 h in a soxhlet apparatus, to remove loosely adhering polymer, washed well and dried at 60 °C (Mondal et al 2006).…”

Section: Graftingmentioning

confidence: 99%

Characterization of grafted jute fiber using acrylate monomers pretreated with alkali

et al. 2016

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The reactivity of lingocellulosic jute fiber to sunlight (UV) and atmospheric gases and chemicals was reduced by grafting jute with acrylate monomers, such as ethyl acrylate (EA) and 2-hydroxy ethyl methacrylate (HEMA). The grafting reaction sufficiently blocked the reactive groups of jute and thus, physically- and chemically-bound cellulosic units and on the fiber surface. The grafting gave additional strength, higher thermal stability and improved surface smoothness. Though the modified fibers showed better color fastness properties in sunlight, the dyeability of the modified fibers somewhat decreased. Grafting reaction and other characteristics of modified fibers were investigated with FT-IR, tensile tester, thermogravimeric analyser, and grey scale respectively. The change of surface morphology of the jute fiber on modification was also observed with a scanning electron microscopy. Modification of bleached jute and alkali-activated bleached jute with HEMA gave higher graft yield (26.6, 29.4 %) than that of EA modification (22.5, 24.7 %). Due to the different chemical features, HEMA-modified fiber exhibited better chemical, thermal and physical properties.

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Graft copolymerization of acrylic acid onto jute fibers initiated by quinquivalent vanadium

Cited by 10 publications

References 9 publications

Free‐radical grafting of 4‐vinyl pyridine onto nylon 6 fiber

Free‐radical grafting of 4‐vinyl pyridine onto nylon 6 fiber

Surface modification of okra bast fiber and its physico-chemical characteristics

Characterization of grafted jute fiber using acrylate monomers pretreated with alkali

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