The synthesis and characterization of acrylamide polymer containing R-(+)-cysteine end groups

Özeroğlu, Cemal; Kurtoğlu, Ayşe Engin

doi:10.1016/s0014-3057(00)00188-9

Cited by 6 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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: 96%

“…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%

“…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.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Özeroğlu

Erdoğan

2005

Open Chemistry

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 96%

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%

See 2 more Smart Citations

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Özeroğlu

Erdoğan

2005

Open Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Mn(II) species that are formed at the end of the polymerization reaction are absorbed by the polymer. 21,25,[30][31][32]37 The dependence of the concentration of Mn(II), which is incorporated into the polymer, on the initiator concentration in the polymerization reaction is given in Fig. 7.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of polyacrylamides containing meso‐2,3‐dimercaptosuccinic acid end groups

Özeroğlu

Birdal

2010

Adv Polym Technol

Self Cite

View full text Add to dashboard Cite

By using meso-2,3-dimercaptosuccinic acid-cerium(IV) sulfate and meso-2,3-dimercaptosuccinic acid-potassium permanganate redox systems, the polymerization reaction of acrylamide (AAm) monomer was examined in aqueous acidic medium at low temperatures. Water-soluble polyacrylamides bearing meso-2,3-dimercaptosuccinic acid end groups were synthesized using meso-2,3-dimercaptosuccinic acid as a reducing agent. The effects of parameters such as the molar ratio of acrylamide to initiator, temperature, polymerization time, and sulfuric acid concentration on the yields and molecular weights of polymers were investigated. The augmentation in initiator concentration resulted in a decrease in molecular weight but an increase in the yield of polymers. The increase in reaction temperature from 20 to 60 • C led to a decrease in the yield from 56.80% to 20.58%. Ce(IV) and Mn(VII) ions are reduced to Ce(III) and Mn(II) ions in the polymerization reaction and the synthesized acrylamide polymers containing meso-2,3-dimercaptosuccinic acid end groups can absorb these ions at the end of the polymerization reaction. Ultraviolet-visible and atomic absorption measurements of polymer solutions were performed to indicate complexation between polyacrylamide and Ce(III) ions or Mn(II) ions. C

show abstract

Low Temperature Initiation by 3-Mercaptopropionic Acid-Ce(IV) or -KMnO₄Redox System for Polymerization of Acrylamide Monomer

Özeroğlu

Özduğancι

2006

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

The synthesis and characterization of acrylamide polymer containing R-(+)-cysteine end groups

Cited by 6 publications

References 21 publications

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Synthesis and characterization of polyacrylamides containing meso‐2,3‐dimercaptosuccinic acid end groups

Low Temperature Initiation by 3-Mercaptopropionic Acid-Ce(IV) or -KMnO₄Redox System for Polymerization of Acrylamide Monomer

Contact Info

Product

Resources

About

The synthesis and characterization of acrylamide polymer containing R-(+)-cysteine end groups

Cited by 6 publications

References 21 publications

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Oxidative polymerization of acrylamide in the presence of thioglycolic acid

Synthesis and characterization of polyacrylamides containing meso‐2,3‐dimercaptosuccinic acid end groups

Low Temperature Initiation by 3-Mercaptopropionic Acid-Ce(IV) or -KMnO4Redox System for Polymerization of Acrylamide Monomer

Contact Info

Product

Resources

About

Low Temperature Initiation by 3-Mercaptopropionic Acid-Ce(IV) or -KMnO₄Redox System for Polymerization of Acrylamide Monomer