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Synthesis of a bis(diketiminate)bromosamarium(III) complex and its activity in the polymerization of methyl methacrylate

Paper ID Volume ID Publish Year Pages File Format Full-Text
44117 46004 2007 5 PDF Available
Title
Synthesis of a bis(diketiminate)bromosamarium(III) complex and its activity in the polymerization of methyl methacrylate
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 °C and a MMA/catalyst molar ratio of 90/1), providing a polymer with a molar mass Mn > 23.0 kg mol−1 and a molar mass distribution (Mw/Mn) < 1.4. After 1 h of polymerization, conversions of MMA as high as 90% were observed.

Graphical abstractBis(diketiminate)bromosamarium(III) was synthesized and shown to be active in the polymerization of methyl methacrylate. The catalyst shows in the first 30 min an activity of 20.2 kg PMMA (mol Sm)−1 h−1, giving a polymer with a molar mass Mn > 23.0 kg mol−1 and molar mass distribution (Mw/Mn) < 1.4. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Methyl methacrylate polymerization; Samarium(III) complex; Diketiminate ligand
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Synthesis of a bis(diketiminate)bromosamarium(III) complex and its activity in the polymerization of methyl methacrylate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 317, Issue 2, 7 February 2007, Pages 149–153
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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