Journal ArticleDOI
Polymerization of Acrylonitrile: Kinetics of the Reaction Initiated by the Mn3+/Ascorbic Acid Redox System
TLDR
In this article, the authors investigated the polymerization of acrylonitrile initiated by the Mn3+/ascorbic acid redox system in aqueous sulfuric acid in the temperature range of 30-45°C.Abstract:
Vinyl polymerization of acrylonitrile initiated by the Mn3+/ascorbic acid redox system was investigated in aqueous sulfuric acid in the temperature range of 30–45°C. The rate of polymerization Rp and the rate of Mn3+ ion disappearance were measured. The effect of additives like water -miscible organic solvents, neutral salts, complexing agents and different surfactants on the initial rate of polymerization were investigated. Depending on the results obtained, a suitable reaction mechanism is suggested which involves the formation of a complex between Mn3+ ion and the acid whose decomposition generates the initiating free radical, with the polymer chain being terminated by mutual combination of the growing chains.read more
Citations
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Journal ArticleDOI
Redox Polymerization Initiated by Metal Ions
Padma L. Nayak,Subasini Lenka +1 more
TL;DR: Redox polymerization as mentioned in this paper is a type of polymerization which is initiated by the reaction between an oxidizing and a reducing agent. But it is not a deterministic process.
Journal ArticleDOI
Peroxydiphosphate-Metal Ion-Cellulose Thiocarbonate Redox System-Induced Graft Copolymerization of Vinyl Monomers Onto Cotton Fabric
Magdy K. Zahran,R. I. Mahmoud +1 more
TL;DR: In this article, the grafting of methacrylic acid (MAA) and other vinyl monomers onto cotton cellulose in fabric form was investigated in an aqueous medium with a potassium peroxydiphosphate-metal ion-cellulose thiocarbonate redox initiation system.
Journal ArticleDOI
Acrylonitrile Polymerization by Ceric lon-Primary Alcohol Redox Systems in Aqueous Nitric Acid
TL;DR: In this paper, the authors applied Taft's correlation to fit the kinetic results relative to a series of differently substituted primary alcohols and found that the alcohol enhances the AN solubility in water and accordingly influences the polymerization kinetics.
Journal ArticleDOI
Grafting Vinyl Monomers onto Chitosan:IV:Graft Copolymerized of Acrylicacid onto Chitosan Using Ceric Ammonium Nitrate as the Initiator— Characterization and Antimicrobial Activities
TL;DR: In this article, acrylic acid was grafted onto chitosan by using the ceric ammonium nitrate as the initiator and the effect of initiator concentration, monomer concentration, time & temperature on % G and % GE were studied.
Journal ArticleDOI
Polymerization of N,N′-methylenebisacrylamide initiated by two new redox systems involving acidic permanganate
TL;DR: In this paper, two new redox systems, viz. KMnO4 with ethyleneglycol and KMn O4 with thioglycollic acid, have been used as initiators for the polymerization of the divinyl monomer, N,N′-methylenebisacrylamide.
References
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The Determination of Enzyme Dissociation Constants
Hans Lineweaver,Dean Burk +1 more
TL;DR: On the basis of the assumed theory the rate of the observed reaction is directly proportional to the concentration of the enzyme-substrate compound, where (E:l = (ES).
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Untersuchungen über die radikalpolymerisation von acrylamid
TL;DR: In this paper, different methods of radical polymerization of acrylamide in solution and in bulk are described, and the results show that polyacrylamides in aqueous solution are homoeopolar molecularcolloids.
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Coulometric titration with higher oxidation states of manganese: Electrolytic generation and stability of +3 manganese in sulfuric acid media
Robert G. Selim,James J. Lingane +1 more
TL;DR: The equilibrium constant for the disproportionation of +3 manganese into the +2 and +4 states in sulfuric acid media has been evaluated spectrophotometrically.
Journal ArticleDOI
Kinetics of vinyl polymerization initiated by ceric ion in aqueous solution
TL;DR: In this article, a systematic kinetic study of the thermal polymerization of methyl methacrylate, methyl acrylate and acrylonitrile initiated by ceric ion in aqueous perchloric, nitric, and sulfuric acid solutions, has been made.
Journal ArticleDOI
Hydrolysis of the Manganic Ion
C. F. Wells,Geoffrey Davies +1 more
TL;DR: In this article, a spectrophotometric investigation of manganic perchlorate solutions prepared electrolytically was carried out and the results of a detailed examination of such solutions at 25° C in the region 300-550 mµ, with acidity varying between 0.10-3.70 M HClO4 at an ionic strength µ = 4.5 NHClO 4.