Kinetics of polymerization of 2-hydroxyethylmethacrylate initiated by a titanium(iii)-dimethylglyoxime redox system

Kalappa Prashantha, Karkala Vasanth Kumar Pai, Malgar Puttaiah Gowda Yashoda, Bailure Sheena Sherigara

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The polymerization of 2-hydroxyethylmethacrylate (HEMA) initiated by the redox system titanium(III)-dimethyl glyoxime (DMG) was studied in dimethyl formamide (DMF)-water (80:20 v/v) medium in the temperature range 290-310 K. The rate of polymerization (Rp) was investigated at various concentrations of reductant, oxidant, sulfuric acid, and monomer. Cyclic voltametric sensing of dimethylglyoxime under the kinetic conditions demonstrated its reduction behavior. From the obtained results, it was inferred that the polymerization reaction was initiated by an organic free radical arising from the titanium(III)-dimethylglyoxime redox system. Chain termination of the polymer took place predominantly by mutual coupling and small fraction by chain transfer mechanism involving solvent molecules. The effects of some water miscible organic solvents and surfactants on the rate of polymerization were investigated. The temperature dependence of the rate was studied and the activation parameters were computed using Arrhenius and Eyring plots. A suitable kinetic scheme is proposed on the basis of experimental observations.

Original languageEnglish
Pages (from-to)99-110
Number of pages12
JournalTurkish Journal of Chemistry
Volume27
Issue number1
Publication statusPublished - 2003

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Titanium
Polymerization
Kinetics
Water
Reducing Agents
Dimethylformamide
Oxidants
Surface-Active Agents
Organic solvents
Free Radicals
Polymers
Monomers
Chemical activation
Temperature
Molecules
dimethylglyoxime
Oxidation-Reduction

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Prashantha, Kalappa ; Pai, Karkala Vasanth Kumar ; Yashoda, Malgar Puttaiah Gowda ; Sherigara, Bailure Sheena. / Kinetics of polymerization of 2-hydroxyethylmethacrylate initiated by a titanium(iii)-dimethylglyoxime redox system. In: Turkish Journal of Chemistry. 2003 ; Vol. 27, No. 1. pp. 99-110.
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abstract = "The polymerization of 2-hydroxyethylmethacrylate (HEMA) initiated by the redox system titanium(III)-dimethyl glyoxime (DMG) was studied in dimethyl formamide (DMF)-water (80:20 v/v) medium in the temperature range 290-310 K. The rate of polymerization (Rp) was investigated at various concentrations of reductant, oxidant, sulfuric acid, and monomer. Cyclic voltametric sensing of dimethylglyoxime under the kinetic conditions demonstrated its reduction behavior. From the obtained results, it was inferred that the polymerization reaction was initiated by an organic free radical arising from the titanium(III)-dimethylglyoxime redox system. Chain termination of the polymer took place predominantly by mutual coupling and small fraction by chain transfer mechanism involving solvent molecules. The effects of some water miscible organic solvents and surfactants on the rate of polymerization were investigated. The temperature dependence of the rate was studied and the activation parameters were computed using Arrhenius and Eyring plots. A suitable kinetic scheme is proposed on the basis of experimental observations.",
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Kinetics of polymerization of 2-hydroxyethylmethacrylate initiated by a titanium(iii)-dimethylglyoxime redox system. / Prashantha, Kalappa; Pai, Karkala Vasanth Kumar; Yashoda, Malgar Puttaiah Gowda; Sherigara, Bailure Sheena.

In: Turkish Journal of Chemistry, Vol. 27, No. 1, 2003, p. 99-110.

Research output: Contribution to journalArticle

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T1 - Kinetics of polymerization of 2-hydroxyethylmethacrylate initiated by a titanium(iii)-dimethylglyoxime redox system

AU - Prashantha, Kalappa

AU - Pai, Karkala Vasanth Kumar

AU - Yashoda, Malgar Puttaiah Gowda

AU - Sherigara, Bailure Sheena

PY - 2003

Y1 - 2003

N2 - The polymerization of 2-hydroxyethylmethacrylate (HEMA) initiated by the redox system titanium(III)-dimethyl glyoxime (DMG) was studied in dimethyl formamide (DMF)-water (80:20 v/v) medium in the temperature range 290-310 K. The rate of polymerization (Rp) was investigated at various concentrations of reductant, oxidant, sulfuric acid, and monomer. Cyclic voltametric sensing of dimethylglyoxime under the kinetic conditions demonstrated its reduction behavior. From the obtained results, it was inferred that the polymerization reaction was initiated by an organic free radical arising from the titanium(III)-dimethylglyoxime redox system. Chain termination of the polymer took place predominantly by mutual coupling and small fraction by chain transfer mechanism involving solvent molecules. The effects of some water miscible organic solvents and surfactants on the rate of polymerization were investigated. The temperature dependence of the rate was studied and the activation parameters were computed using Arrhenius and Eyring plots. A suitable kinetic scheme is proposed on the basis of experimental observations.

AB - The polymerization of 2-hydroxyethylmethacrylate (HEMA) initiated by the redox system titanium(III)-dimethyl glyoxime (DMG) was studied in dimethyl formamide (DMF)-water (80:20 v/v) medium in the temperature range 290-310 K. The rate of polymerization (Rp) was investigated at various concentrations of reductant, oxidant, sulfuric acid, and monomer. Cyclic voltametric sensing of dimethylglyoxime under the kinetic conditions demonstrated its reduction behavior. From the obtained results, it was inferred that the polymerization reaction was initiated by an organic free radical arising from the titanium(III)-dimethylglyoxime redox system. Chain termination of the polymer took place predominantly by mutual coupling and small fraction by chain transfer mechanism involving solvent molecules. The effects of some water miscible organic solvents and surfactants on the rate of polymerization were investigated. The temperature dependence of the rate was studied and the activation parameters were computed using Arrhenius and Eyring plots. A suitable kinetic scheme is proposed on the basis of experimental observations.

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