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Peroxo salts as initiators of vinyl polymerization—III. Polymerization of acrylonitrile initiated by the peroxomonosulphate-Co(II) redox system

✍ Scribed by G. Manivannan; P. Maruthamuthu

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
228 KB
Volume
23
Category
Article
ISSN
0014-3057

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✦ Synopsis

The kinetics of aqueous polymerization of acrylonitrile initiated by peroxomonosulphate-Co(II) redox system have been investigated in the range 30-50°C under nitrogen at a fixed ionic strength of 0.30mol-dm -3. The overall rate of polymerization, followed gravimetrically, was found to be proportional to [AN]I5[PMS]I °[Co(ll)]° 5. The activation energy was found to be 42 kJ. tool t. An increase in ionic strength slightly decreased the rate of polymerization. Inhibition of polymerization was caused by the addition of sulphuric acid in the range of 0.05~).50 mol.dm 3. The rate law for polymerization was fitted to a reaction mechanism involving all possible initiation reactions and termination by mutual combination.

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