Vinyl Polymerization Initiated by Metal Chelates. II. Polymerization of Methyl Methacrylate Initiated by Acetylacetonato Complexes of Manganese(III), Cobalt(III), and Iron(III)

Artigo

Vinyl Polymerization Initiated by Metal Chelates. II. Polymerization of Methyl Methacrylate Initiated by Acetylacetonato Complexes of Manganese(III), Cobalt(III), and Iron(III)

1982; Marcel Dekker; Volume: 18; Issue: 5 Linguagem: Inglês

10.1080/00222338208074430

ISSN

2332-4082

Autores

Subasini Lenka, Padma L. Nayak,

Tópico(s)

Asymmetric Hydrogenation and Catalysis

Resumo

Abstract The polymerization of methyl methacrylate was studied using Mn(acac)3, Co(acac)3, and Fe(acac)3 complexes. The rate of polymerization at various complex and monomer concentrations were investigated and it was observed that the plots of Rp versus [M] 2 and Rp versus 1/[complex] were linear. The reactions were studied at different temperatures and the overall activation energies were computed to be 4.70, 5.50, and 6.40 kcal/mol for Mn3+, Co3+, and Fe3+ complexes, respectively. The effect of inhibitor on the polymerization rate was studied. Using the well-known Tüdös equation, the Tüdös inhibitor constant was computed to be 10. A suitable kinetic scheme for the polymerization has been pictured.

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Vinyl Polymerization Initiated by Metal Chelates. II. Polymerization of Methyl Methacrylate Initiated by Acetylacetonato Complexes of Manganese(III), Cobalt(III), and Iron(III)