Graft copolymerization of acrylamide onto xanthan gum

Behari, Kunj; Pandey, Peeyoosh Kant; Kumar, Rajesh; Taunk, Kavita

doi:10.1016/s0144-8617(00)00291-5

Cited by 74 publications

(34 citation statements)

References 4 publications

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“…Temperatures higher than 70 o C disfavor the grafting parameters. At higher temperatures, the rate of termination of the growing chain is increased 25 and the monomer is volatilized out to some extent 26 . figure 10.…”

Section: Effect Of Kc Concentrationmentioning

confidence: 99%

Studies on Graft Copolymerization of 2-Hydroxyethylmethacrylate Onto Kappa-Carrageenan Initiated by Ceric Ammonium Nitrate

Sadeghi

Hosseinzadeh²

2010

J. Chil. Chem. Soc.

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The polysaccharide, kappa-carrageenan (kC), has been chemically modified by graft copolymerization of 2-hydroxyethylmethacrylate (HEMA) in an aqueous medium using ceric ammonium nitrate (CAN) as an initiator under argon atmosphere. A plausible reaction mechanism of grafting has been suggested. Evidence of grafting was obtained by comparison of FTIR spectra of kC and homopolymer-free kC-g-poly(HEMA) as well as solubility characteristics and gravimetric analysis of the products. The optimum reaction conditions affording maximum grafting ratio and add-on value have been determined. The grafting parameters have been found to increase with increasing in kC, CAN, and HEMA concentrations as well as polymerization time and temperature, up to a certain value, but these parameters decrease on further increasing in reaction conditions.

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Section: Effect Of Kc Concentrationmentioning

confidence: 99%

Studies on Graft Copolymerization of 2-Hydroxyethylmethacrylate Onto Kappa-Carrageenan Initiated by Ceric Ammonium Nitrate

Sadeghi

Hosseinzadeh²

2010

J. Chil. Chem. Soc.

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“…The same behavior of bromate ion was also observed in our laboratory, with acrylamide monomer. 9 The enhancement in above grafting parameters is due to the formation of greater number of primary free radicals, but as the concentration of …”

Section: Effect Of Bromate Ion Concentrationmentioning

confidence: 99%

Graft copolymerization of 2‐acrylamido‐2‐methyl‐1‐propanesulphonic acid onto carboxymethylcellulose (sodium salt) using bromate/thiourea redox pair

Banerjee

Kumar

Srivastava

et al. 2005

J of Applied Polymer Sci

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Unreported graft copolymer of 2-acrylamido-2-methyl-1-propanesulphonic acid (AMPS) with sodium carboxymethylcellulose (Na-CMC) was synthesized and reaction conditions were optimized using a bromate/ thiourea redox pair under an inert atmosphere at 40°C. Grafting ratio, add on, and conversion increase as the concentration of thiourea and [H ϩ ] increases up to 3.6 ϫ 10 Ϫ3and 0.6 ϫ 10 Ϫ2 mol dm Ϫ3, respectively, while on increasing the concentration of bromate ion and Na-CMC, grafting ratio, add on, and conversion decrease. The samples of Na-CMC and grafted Na-CMC with AMPS were subjected to thermogravimetric analysis, with the objective of studying the effect of grafting of AMPS on the thermal stability of graft copolymer. The graft copolymer was found to be more thermally stable than pure Na-CMC. Comparing the IR spectra of pure with grafted Na-CMC confirm the evidence of grafting.

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“…Graft copolymerization of natural polymers with functional synthetic polymers gives modified products having a wide range of applications due to combining in one molecule the desired properties of both the natural polymer and the synthetic polymer (Behari et al 2001;Biswal and Singh 2004;Maia et al 2012;Pandey and Mishra 2011). Graft copolymerization is an easy method to modify the structure of natural polymers and thus makes them suitable for various applications such as flocculants (Ghorai et al 2013;Sen et al 2011), controlled drug release (Namazi and Belali 2015) and petroleum recovery treatments (Singh and Mahto 2016b;Song and Zhang 2007) of mature reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and evaluation of polyacrylamide graft starch/clay nanocomposite hydrogel system for enhanced oil recovery

Singh

Mahto

2017

Pet. Sci.

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In this paper the suitability of a graft polymer nanocomposite hydrogel system for enhanced oil recovery was examined using polyacrylamide graft starch/clay nanocomposite (a laboratory synthesized product) and chromium (III) acetate (crosslinker). X-ray diffraction analysis, Fourier transform infrared spectrometry analysis, field-emission scanning electron microscopy and transmission electron microscopy were carried out to reveal the laboratory synthesized product as a nanocomposite. The effects of various parameters like salt concentration, pH, temperature, polymer concentration and crosslinker concentration on the properties of the developed gel system were systematically evaluated. The thermal stability of the nanocomposite gel and the conventional gel system were also determined by thermogravimetric analysis. The graft polymer nanocomposite gel system exhibited acceptable gel strength, gelation time and gel stability compared with the conventional gel system. The nanocomposite gels prepared using a low crosslinker concentration showed higher gel strength and required longer gelation time than the conventional gel which is more desirable properties for the effective placement of gel during enhanced oil recovery operations. In addition, sand pack flooding experiments show that the graft polymer nanocomposite gels had better plugging capacity than the conventional gel systems under reservoir conditions. Hence, this gel system may be suitable in the water shutoff treatments required for enhanced oil recovery from oilfields.

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Graft copolymerization of acrylamide onto xanthan gum

Cited by 74 publications

References 4 publications

Studies on Graft Copolymerization of 2-Hydroxyethylmethacrylate Onto Kappa-Carrageenan Initiated by Ceric Ammonium Nitrate

Studies on Graft Copolymerization of 2-Hydroxyethylmethacrylate Onto Kappa-Carrageenan Initiated by Ceric Ammonium Nitrate

Graft copolymerization of 2‐acrylamido‐2‐methyl‐1‐propanesulphonic acid onto carboxymethylcellulose (sodium salt) using bromate/thiourea redox pair

Synthesis, characterization and evaluation of polyacrylamide graft starch/clay nanocomposite hydrogel system for enhanced oil recovery

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