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Acidic peroxo salts: A new class of initiators for vinyl polymerization—II: Kinetics of polymerization of acrylonitrile initiated by potassium monopersulphate catalysed by Mn(II)

✍ Scribed by R.K. Samal; M.C. Nayak; D.P. Das

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 312 KB
Volume: 18
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(82)90161-6

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✦ Synopsis

Kinetics of the polymerization of acrylonitrile initiated by an acidic peroxo salt (potassium monopersulphate) catalysed by Mn(II) have been investigated in aqueous systems over the range 30-50'. The rates of polymerization (Rv) have been studied for various concentrations of monomer and initiator. The etficiencies of various metal salts in catalysing the polymerization have been determined from the values of Rp. The effects of catalyst (MnSO4), initiator, monomer and various aromatic and heterocyclic amines on Rp and conversion have been studied. The end-groups of the recovered polymers have been studied using standard methods. From the observed end-groups and kinetic results, a reaction scheme has been proposed, involving initiation by OH' or SO~, radicals, generated by the interaction of the initiator with manganous sulphate, and termination by mutual combination.

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