Effect of the type of solvent on radical polymerization of N-vinylpyrrolidone

Karaputadze, T. M.; Shumskii, V. I.; Kirsh, Yu. E.

doi:10.1016/0032-3950(78)90334-9

Cited by 14 publications

(14 citation statements)

References 6 publications

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“…As seen, v 0 decreases in the series water > water : DMF = 1 : 1 > DMF; the same trend is observed for [h]. These changes in v 0 with increasing content of the protic solvents in the reaction mixture well agree with the data on changes in the reaction rate on passing from aprotic to protic solvents in homopolymerization of H-AMS [16] and VP [17,18]. In accordance with published data on several water-soluble monomers [3] and, in particular, on VP [19], acceleration of copolymerization of Na-AMS and VP in a protic solvent is caused by solvation of the monomers due to formation of hydrogen bonds between the C=O group of the monomer and solvent.…”

supporting

confidence: 87%

Copolymerization of Sodium 2-Acrylamido-2-methylpropane-1-sulfonate with N-Vinylpyrrolidone in Aqueous Dimethylformamide Solutions

et al. 2005

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The kinetics of radical copolymerization of sodium 2-acrylamido-2-methylpropane-1-sulfonate with N-vinylpyrrolidone in water, water3dimethylformamide (1 : 1) solutions, and dimethylformamide at pH 9 and 60oC in the presence of initiators [azobis(isobutyronitrile) and ammonium persulfate] was studied by dilatometry.The reaction medium strongly affects both the kinetic parameters of copolymerization of salts of 2-acrylamido-2-methylpropane-1-sulfonic acid (H-AMS) with N-vinylpyrrolidone (VP) and the properties of the resulting copolymers. This is due to the features in the behavior of ionic monomers [1, 2] and nonionic VP monomer [3,4] in the processes of radical (co)polymerization. Previously we studied copolymerization of sodium 2-acrylamido-2-methylpropane-1-sulfonate (Na-AMS) with VP in aqueous [537] and dimethyl sulfoxide [8] solutions and examined how the ionic strength of the solution and kind of mono-[9, 10] and bivalent [10,11] cations affect the copolymerization in aqueous solutions.

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supporting

confidence: 87%

Copolymerization of Sodium 2-Acrylamido-2-methylpropane-1-sulfonate with N-Vinylpyrrolidone in Aqueous Dimethylformamide Solutions

et al. 2005

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“…It was shown from investigations in solvents of a wide viscosity range '-5) that there exists a direct correlation between the solvent viscosity and the monomer exponent6) in the rate equation. A high solvent sensibility of its homopolymerization rate was found by several authors [14][15][16] and similar effects as for MMA were discussed [15][16][17]. Further investigations in common viscous solvents (0,5 -1,5 mPa .…”

Section: Introductionsupporting

confidence: 70%

Solvent effects on free‐radical polymerization, 2. IR and NMR spectroscopic analysis of monomer mixtures of methyl methacrylate and N‐vinyl‐2‐pyrrolidone in bulk and in model solvents

Czerwiński

1991

Makromol. Chem.

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Binary systems of methyl methacrylate (MMA)/N-vinyl-2-pyrrolidone (NVP) and MMA/ N-methyl-2-pyrrolidone (NMP) with NMP as saturated model of NVP and of NVP/methyl isobutyrate (MiB) with MiB as saturated model of MMA were investigated by means of IR and NMR spectroscopy. Investigations were carried out at room temperature or at 60°C in CHC1, (IR) or CDCI, and C,H,,/C6D12 (NMR). It can be concluded from IR and NMR spectra that the polarity of MMA increases in the presence of NVP and the polarity of NVP decreases in the presence of MMA. Equilibrium constants K of complex formation were determined to: K = 0,169+-0,037 L -m o l -' for MMA/NVP at 30°C, 0,112 k 0,024 L-mol-' for NVP/MiB at 60°C and 0,125 +. 0,030 L . mol-' for MMA/NMP at 60°C.

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“…Molecular size arguments in combination with the increase in the strength of intermolecular interactions due to both the addition of water to VP and of VP to water may qualitatively explain the curvature in Figure 1. A similar such viscosity maximum has been reported for the 1-vinylimidazole-water system at 70 8C by Bamford and Schofield [31] as well as for aqueous VP solutions at 50 8C by Senogles and Thomas [32] and at 60 8C by Karaputadze et al [33,34] The detailed understanding of the viscosity-composition curve in Figure 1 is beyond the scope of this paper. The dependence of viscosity on initial monomer weight fraction may be adequately described by the polynomial:…”

Section: Resultsmentioning

confidence: 76%

Termination Kinetics of 1‐Vinylpyrrolidin‐2‐one Radical Polymerization in Aqueous Solution

Schrooten

Buback

Hesse

et al. 2011

Macro Chemistry & Physics

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Termination kinetics of 1‐vinylpyrrolidin‐2‐one radical polymerization in aqueous solution has been studied at 40 °C between 20 and 100 wt.‐% VP. The <kt>/kp values from laser single‐pulse experiments with microsecond time‐resolved NIR detection of monomer conversion, in conjunction with kp from literature, yield chain‐length‐averaged termination rate coefficients, <kt>. Because of better signal‐to‐noise quality, experiments were carried out at 2 000 bar, but also at 1 500, 1 000, and 500 bar, thus allowing for estimates of <kt> at ambient pressure. The dependence of <kt> on monomer conversion indicates initial control by segmental diffusion followed by translational diffusion and finally reaction diffusion control. To assist the kinetic studies, viscosities of VP–water mixtures at ambient pressure have been determined. magnified image

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Effect of the type of solvent on radical polymerization of N-vinylpyrrolidone

Cited by 14 publications

References 6 publications

Copolymerization of Sodium 2-Acrylamido-2-methylpropane-1-sulfonate with N-Vinylpyrrolidone in Aqueous Dimethylformamide Solutions

Copolymerization of Sodium 2-Acrylamido-2-methylpropane-1-sulfonate with N-Vinylpyrrolidone in Aqueous Dimethylformamide Solutions

Solvent effects on free‐radical polymerization, 2. IR and NMR spectroscopic analysis of monomer mixtures of methyl methacrylate and N‐vinyl‐2‐pyrrolidone in bulk and in model solvents

Termination Kinetics of 1‐Vinylpyrrolidin‐2‐one Radical Polymerization in Aqueous Solution

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