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Type: Artigo de periódico
Title: Synthesis of a bis(diketiminate)bromosamarium(III) complex and its activity in the polymerization of methyl methacrylate
Author: Muterle, RB
Fabri, F
Buffon, R
de Oliveira, W
Schuchardt, U
Abstract: A bis(diketiminate)bromosamarium(III) complex was successfully synthesized and, after the activation with butyl lithium, was shown to be active in methyl methacrylate (MMA) polymerization. The effects of temperature, polymerization time and catalyst concentration were studied. Activities of ca. 16,000 g of poly(methyl methacrylate) (PMMA) per mol of samarium and per hour were obtained under optimum conditions (0 degrees C and a MMA/catalyst molar ratio of 90/1), providing a polymer with a molar mass M-n > 23.0 kg mol(-1) and a molar mass distribution (M-w/ M-n) < 1.4. After 1 h of polymerization, conversions of MMA as high as 90% were observed. (c) 2006 Elsevier B.V. All rights reserved.
Subject: methyl methacrylate polymerization
samarium(III) complex
diketiminate ligand
Country: Holanda
Editor: Elsevier Science Bv
Citation: Applied Catalysis A-general. Elsevier Science Bv, v. 317, n. 2, n. 149, n. 153, 2007.
Rights: fechado
Identifier DOI: 10.1016/j.apcata.2006.10.011
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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