The polymerization of acrylamide (AAm) initiated by redox pair: the ceric ammonium nitrate[Ce(IV)]-hydroxy containing thermolabile azo compounds (R) has been investigated in aqueous nitric acid at 20Β°C. It was determined that how the rate of polymerization depends on [AAm], [R] (1 or 2) and [Ce(IV)]
Polymerization of acrylamide by the redox system cerium(IV) with poly (ethylene glycol) with azo groups
β Scribed by Ismail Cakmak; Baki Hazer; Yusuf Yagci
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 152 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
Polymerization of acrylamide using Ce(IV) with poly(ethylene glycol) having azo and hydroxyl functions, was carried out to yield acrylamide-(ethylene glycol) block copolymers with labile azo linkages in the main chains. These prepolymers were used to induce the radical polymerization of acrylonitrile and acrylamide through the thermal decomposition of the azo group, resulting in the formation of multiblock copolymers.
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Polymerization of methyl methacrylate using H20, with poly(ethylene oxide) having xanthate groups, was carried out to yield methyl methacrylate-ethylene oxide block copolymers. Principal parameters affecting the synthesis were examined. Block copolymers were characterized by spectroscopic methods.
The acidic aqueous emulsion polymerization of methyl methacrylate, initiated by ceric ammonium nitrate<lodecyl poly(ethylene oxide) redox system at 30 Β°, was studied. The polymerization was characterized by a pronounced gel effect and showed deviations from the Smith-Ewart theory established for sty
Glycine-Ce(IV) salts and -KMnO, initiator systems were used for the polymerization of acrylamide, resulting in water-soluble polyacrylamide, which contains amino acid end groups. The dependence of polymerization yields and molecular weights of polymers on the mole ratio of acrylamide monomer to glyc
Hydroxyl functional azo compounds have been used as reducing agents in redox polymerization of methyl methacrylate (MMA) in conjunction with ceric ammonium nitrate (which acts as a n oxidizing agent in aqueous nitric acid a t 20Β°C). Kinetic measurements were followed by gravimetric method, at lower
## Abstract 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 (NH~4~)~2~S~2~O~8~ and Na~2~SO~3~, as well as by the degr