The polymerization of acrylamide initiated with Ce(IV) and KMnO4 redox systems in the presence of glycine

Özeroğlu, Cemal; Güney, Orhan; Saraç, A. Sezai̊; Mustafaev, Mamed

doi:10.1002/(sici)1097-4628(19960502)60:5<759::aid-app15>3.3.co;2-0

Cited by 14 publications

(21 citation statements)

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“…The relation between conversion % and monomer concentration is unusual and unexpected and the reason is not known. Unlike the UV-visible spectrum of homopolyacrylamide, the UV-visible spectrum of polyacrylamide obtained using Ce(IV)-organic acid or amino acid (with or without thiol group) redox system indicates a peak at 254 nm, due to the complex formation between Ce(III) ions and polymer containing reducing agent end groups [21][22][23]. Two peaks at 238 nm and 253 nm were observed in the UV-visible spectrum of acrylamide polymer synthesized using the thioglycolic acid-Ce(IV) redox system.…”

Section: Resultsmentioning

confidence: 90%

“…Both Mn(IV) and Mn(III) ions reduced to Mn(II) ions in polymerization reactions. The Mn(II) species that occur at the end of the polymerization reaction are absorbed with polymer [21][22][23]. The effect of initiator concentration on the concentration of Mn(II) which is incorporated in the polymer is given in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore the polymerization of acrylamide initiated with Ce(IV)-organic reducing agents such as polyamino, amino and carboxylic acids [17][18][19][20][21][22] requires higher energy, longer time and lower acid concentration than initiated with Ce(IV)-organic reducing agents containing thiol groups. In this study, the polymerization of acrylamide using thioglycolic acid-Ce(IV) or KMnO 4 redox system in acidic aqueous medium was examined at room temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…However, this method is quite laborious and time consuming. The Mv values were calculated by using the Mark-Houwink equation [18][19][20][21][22][23].…”

Section: Methodsmentioning

confidence: 99%

“…Water-soluble polymers containing amine, hydroxyl, carboxyl or dicarboxylic end groups by using redox initiator system were synthesized [18][19][20][21][22][23][24]. In most previous studies, the polymerization of vinyl monomers initiated with KMnO 4 or ceric salts-organic acid reducing system were performed at relatively high temperatures.…”

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confidence: 99%

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Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Özeroğlu

Erdoğan

2005

Open Chemistry

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Chemical polymerization of acrylamide at room temperature was examined by using thioglycolic acid-cerium (IV) sulfate and thioglycolic acid-KMnO 4 redox systems in acid aqueous medium. Water soluble polyacrylamides containing thioglycolic acid end groups were synthesized. The effects of the molar ratio of acrylamide to Ce(IV) n AAm /n Ce(IV ) , the polymerization time, the temperature, the monomer concentration, the molar ratio of cerium (IV) sulfate to thioglycolic acid and the concentration of sulfuric acid on the yield and molecular weight of polymer were investigated. Lower molar ratios of acrylamide/Ce(IV) at constant monomer concentration resulted in an increase in the yield but a decrease in molecular weight of polymer. The increase of reaction temperature from 20 to 70 • C resulted in a decrease in the yield but generally resulted in a constant value for the molecular weight of polymer. With increasing polymerization time, the yield and molecular weight of polymer did not change substantially. Ce(IV) and Mn(VII) ions are reduced to Ce(III) and Mn(II) ions respectively in the polymerization reaction. The existence of Ce(III) ion bound to polymer was investigated by UV-visible spectrophotometry and fluorescence measurements. The amount of Mn(II) incorporated into the polymer was determined using graphite furnace atomic absorption spectrometry. The mechanism of this phenomenon is discussed.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…However, this method is quite laborious and time consuming. The Mv values were calculated by using the Mark-Houwink equation [18][19][20][21][22][23].…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Özeroğlu

Erdoğan

2005

Open Chemistry

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Synthesis of block copolymers via redox polymerization

Atici

Akar

Ayar

et al. 1999

J. Appl. Polym. Sci.

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Polymerization and copolymerization of vinyl monomers such as acrylamide, acrylonitrile, vinyl acetate, and acrylic acid with a redox system of Ce(IV) and organic reducing agents containing hydroxy groups were studied. The reducing compounds were poly(ethylene glycol)s, halogen-containing polyols, and depolymerization products of poly(ethylene terephthalate). Copolymers of poly(ethylene glycol)s-b-polyacrylonitrile, poly(ethylene glycol)s-b-poly(acrylonitrile-co-vinyl acetate), poly(ethylene glycol)s-b-polyacrylamide, poly(ethylene glycol)s-b-poly(acrylamide-co-vinyl acetate), poly(1-chloromethyl ethylene glycol)-bpoly(acrylonitrile-co-vinyl acetate), and bis[poly-(ethylene glycol terephthalate)]-b-poly(acrylonitrile-co-vinyl acetate) were produced. The yield of acrylamide polymerization and the molecular weight of the copolymer increased considerably if about 4% vinyl acetate was added into the acrylamide monomer. However, the molecular weight of the copolymer was decreased when 4% vinyl acetate was added into the acrylonitrile monomer. Physical properties such as solubility, water absorption, resistance to UV light, and viscosities of the copolymers were studied and their possible uses are discussed.Dedicated to the 225 th anniversary of the Istanbul Technical University.

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Solvent effect on methyl methacrylate polymerization by cerium

Saraç¹,

Özkara

2000

Macromol. Chem. Phys.

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The polymerization of methyl methacrylate (MMA) initiated by CeIV was conducted in DMF/Water and acetonitrile. The effect of the monomer concentration and the DMF content on the conversion were investigated. The yield of the process, which proceeds under mild conditions in the mixture of DMF and water (80/20) was high. The study was augmented by cyclic voltammetric and spectrophotometric investigation. The resulting polymer was characterized by FTIR spectroscopy, and its Mw was determined viscometrically. A possible mechanism for the polymerization is suggested.

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The polymerization of acrylamide initiated with Ce(IV) and KMnO4 redox systems in the presence of glycine

Cited by 14 publications

References 0 publications

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Synthesis of block copolymers via redox polymerization

Solvent effect on methyl methacrylate polymerization by cerium

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