Graft polymerization of methyl methacrylate onto guar gum with ceric ammonium sulfate/dextrose redox pair

Chowdhury, Pranesh; Samui, S.; Kundu, Tapas K.; Nandi, Mahasweta

doi:10.1002/app.2214

Cited by 27 publications

(8 citation statements)

References 11 publications

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“…Grafting of unsaturated monomers on to guar gum, though not as thoroughly investigated as in the case of more abundant polysaccharides such as starch and cellulose, was previously studied. Grafting of acrylamide [3][4][5], acrylic acid [6], methyl methacrylate [7] on to guar gum was reported. Grafting of acrylonitrile is interesting because it leads to anionic grafts, which are useful in applications such as water retention and metal complexation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of guar gum‐graft‐polyacrylonitrile

Thimma

Reddy

Tammishetti

2003

Polymers for Advanced Techs

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Cerium(IV) mediated grafting of polyacrylonitrile on to guar gum was studied. Grafting parameters were studied gravimetrically, as a function of temperature, initiator concentration and Guar to acrylonitrile ratio. Higher temperatures resulted in higher monomer conversion and homopolymer formation. Both monomer conversion and extent of grafting increased with increase in cerium ion concentration in the range studied (0.91-9.12 mmol/l). Similar results were obtained with increase in monomer to guar gum ratio from 1 to 5. Grafting with this initiator was found to be generally good with high grafting efficiencies and low homopolymer formation for most experiments. The copolymers obtained were subjected to alkaline hydrolysis to convert nitrile groups in to carboxylic acid groups and the water absorbency of the resulting anionic guar gum was studied. Materials with water absorption up to 300 g/g could be obtained from this study. FIGURE 2. IR spectra of (a) native guar gum, (b) PAN-g-guar gum (GR ¼ 312%) and (c) alkali hydrolyzed PAN-g-guar gum. 666 / Thimma et al.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of guar gum‐graft‐polyacrylonitrile

Thimma

Reddy

Tammishetti

2003

Polymers for Advanced Techs

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“…Methyl methacrylate (MMA, Merck, Germany) was purified before use. 4 Ceric ammonium sulphate (CAS, Himedia Laboratories Pvt. Ltd., India) was used.…”

Section: Methodsmentioning

confidence: 99%

“…The appearance of the characteristics peak at 1735 cm -1 is probably due to the presence of saturated ester group. 4,12 The presence of ester group in the grafted polymer provides a substantial evidence of graft polymerization of methyl methacrylate onto gum (methyl methacrylate, an alpha beta-unsaturated ester, produces saturated ester on grafting, Eq. 9).…”

Section: Characterizationmentioning

confidence: 99%

“…Polymethyl methacrylate (PMMA) is a nonbiodegradable, brittle and effective drug reducer polymer. 4 AG and PMMA have been selected for grafting to obtain grafted natural polymer (PMMA-g-AG) having well balanced physico-chemical properties (processibility, solubility, biodegradability, drug reducibility, etc.). 16 Transition metal ions [5][6][7] (Fe 3+ , Cu 2+ , Co 3+ , Ce 4+ , Cr 6+ , etc.)…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Poly(Methyl Methacrylate) Grafted from Acacia Gum

Chowdhury

Samui

Kundu

et al. 2004

J Chinese Chemical Soc

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Graft polymerization of methyl methacrylate onto acacia gum has been studied in detail. The grafting was found to be optimal under the following reaction conditions: gum at 0.4 g/dL, monomer at 7.52 × 10−;2 mol/dL, ceric ammonium sulfate at 15.81 × 10−;4 mol/dL, H2SO4 at 0.037 mol/dL, temperature at 50 °C and time at 3.0 h. Fourier transform infrared spectroscopy was sed for the confirmation of grafting. Thermal and physical properties of the copolymer were studied. A probable mechanism of polymerization has been suggested based on reaction kinetics.

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“…Many investigations have been carried out on grafting of vinyl monomers onto guar gum and partially carboxymethyled guar gum using various redox pairs. However, reports on photo‐grafting of vinyl monomers onto sodium salt of partially carboxymethylated guar gum are scanty .…”

Section: Introductionmentioning

confidence: 99%

Photo‐induced graft copolymerization of acrylonitrile onto sodium salt of partially carboxymethylated guar gum

Trivedi

Thaker

Trivedi

2014

J of Applied Polymer Sci

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Photo‐induced graft copolymerization of acrylonitrile (AN) onto sodium salt of partially carboxymethylated guar gum (Na‐PCMGG, DStrue¯ = 0.291) was carried out in an aqueous medium using ceric ammonium nitrate (CAN) as photo‐initiator to synthesize a novel graft copolymer, Na‐PCMGG‐g‐PAN, which may find potential application as a superabsorbent hydrogel. Studying the influence of concentrations of photo‐initiator (CAN), nitric acid, monomer (AN) as well as reaction time, temperature, and amount of substrate on the grafting yields, the reaction conditions for optimum grafting were evaluated. Maximum values of the grafting yields achieved were %G = 285.77 and %GE = 70.76 at optimized conditions. The proposed kinetic scheme could explain very well the experimental results. The influence of different kind of acids on the grafting yields was also studied. Grafting process was confirmed with the help of FTIR, thermal (TGA/DSC), and SEM techniques. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41371.

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Graft polymerization of methyl methacrylate onto guar gum with ceric ammonium sulfate/dextrose redox pair

Cited by 27 publications

References 11 publications

Synthesis and characterization of guar gum‐graft‐polyacrylonitrile

Synthesis and characterization of guar gum‐graft‐polyacrylonitrile

Synthesis and Characterization of Poly(Methyl Methacrylate) Grafted from Acacia Gum

Photo‐induced graft copolymerization of acrylonitrile onto sodium salt of partially carboxymethylated guar gum

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