Polymerization of carboxyl group containing monomers with chemical initiators. Part I. Polymerization of acrylic acid

Ibrahim, N. A.; Haggag, K.; Shoushda, M. Abou; Hebeish, A.

doi:10.1002/actp.1989.010401202

Cited by 15 publications

(1 citation statement)

References 21 publications

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“…Under the conditions used in the reaction, ammonium persulfate decomposes into SO À 4 and OH free radical species ðR Þ [8,19] , which can bring about two kinds of polymerization reactions:…”

Section: Tentative Mechanismmentioning

confidence: 99%

Preparation of a Chemical Polyblend Sizing Agent via Polymerization of Acrylic Acid with Polyvinyl Alcohol

Hebeish

Fahmy

Abo‐Shosha

et al. 2006

Polymer-Plastics Technology and Engineering

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A polyblend sizing agent was prepared by free radical polymerization of partially neutralized acrylic acid (AA) in the presence of polyvinyl alcohol, (PVOH) (Vinarol 1 DV of Clariant), using ammonium persulfate (AP) initiator. Polymerization was conducted under different conditions including AP concentration (0.025-0.125 mol/L), degree of neutralization (3-50%), time (0-60 min), temperature (50-80 C), AA/PVOH ratio (0.2:1.2), type of neutralizing agent (NaOH or NH 4 OH), and PVOH concentration (50-150 g/L). At optimum polymerization conditions, 100 g/L PVOH, 75 g/L AA (3% neutralized using NH 4 OH), 0.1 mol/L AP, at 70 C for 25 min, a polyblend was prepared with a percent total conversion of 94%. It was then neutralized with NaOH to a pH of 7. Rheological properties of 10% aqueous solution of the polyblend or PVOH at 80 C revealed that the first was of a nonNewtonian pseudoplastic flow and the latter is of a non-Newtonian thixotropic flow. Solubility time of the polyblend film was shorter than that of PVOH, either after thermal treatment (120 C/15 min) or without thermal treatment. Sized gauzy fabric samples using the polyblend were of higher tensile strength and extent of size removal than those sized with PVOH.

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Section: Tentative Mechanismmentioning

confidence: 99%

Preparation of a Chemical Polyblend Sizing Agent via Polymerization of Acrylic Acid with Polyvinyl Alcohol

Hebeish

Fahmy

Abo‐Shosha

et al. 2006

Polymer-Plastics Technology and Engineering

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Polymerization of carboxyl group containing monomers with chemical initiators. Part II. Polymerization of methacrylic acid

et al. 1990

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Polymerization of carboxyl group containing monomers with chemical initiators. Part III. Polymerization of acrylic acid induced by the persulphate/sulphite redox system

Hafiz¹,

El-Sisi²,

Higazy³

et al. 1990

Acta Polymerica

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The polymerization of acrylic acid by the redox system ammonium persulphate/sodium sulphite was studied under a variety of conditions. The obtained results indicate that the total conversion is determined by the concentrations of (NH4)2S2O8 and Na2SO3, as well as by the degree of neutralization of acrylic acid and the duration of polymerization. The apparent viscosity of the formed poly(acrylic acid) decreases as the shear rate increases due to the deformation of the poly(acrylic acid) macromolecules under the influence of higher shear rate. A tentative mechanism for the polymerization reaction is suggested.

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Polymerization of carboxyl group containing monomers with chemical initiators. Part I. Polymerization of acrylic acid

Cited by 15 publications

References 21 publications

Preparation of a Chemical Polyblend Sizing Agent via Polymerization of Acrylic Acid with Polyvinyl Alcohol

Preparation of a Chemical Polyblend Sizing Agent via Polymerization of Acrylic Acid with Polyvinyl Alcohol

Polymerization of carboxyl group containing monomers with chemical initiators. Part II. Polymerization of methacrylic acid

Polymerization of carboxyl group containing monomers with chemical initiators. Part III. Polymerization of acrylic acid induced by the persulphate/sulphite redox system

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