Polymerization of vinyl monomers via MAO activated iron(II) dichloro complexes bearing bis(imino)pyridine-, quinolinaldimine- and thiophenaldimine-based tridentate nitrogen ligands |
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Authors: | Adnan S Abu-Surrah Abdussalam K Qaroush |
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Institution: | Hashemite University, Department of Chemistry, P.O. Box 150459, Zarqa 13115, Jordan |
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Abstract: | A series of iron(II) complexes (4a-d, 10, and 11) bearing 2,6-bis(imino)ethyl]pyridine-(3a-d), quinolinaldimine-(8) and thiophenaldimine-(9) based ligands were disclosed as active complexes for the polymerization of tert-butylacrylate (t-BA). After activation with methyl aluminoxane (MAO), the complexes showed moderate to high polymerization activities and produced high molar mass polymers. In addition, the catalyst system 4d/MAO was examined for the polymerization of methyl methacrylate (MMA) and n-vinylcarbazole (NVC). The influence of MAO/Cat. molar ratio, polymerization time, and monomer concentration on the polymerization reaction of methyl methacrylate was explored.In the polymerization of tert-butylacrylate with 2,6-bis(imino)ethyl]pyridine iron(II)-based catalysts, bulky terminal aliphatic substituents have a favorable influence on the polymerization activity compared to the aromatic ones. This catalyst system was also more active than the quinolinaldimine-, (10) and thiophenaldimine-, (11) based catalysts. |
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Keywords: | Polymerization Catalysis Acrylate n-Vinylcarbazole Iron(II) complexes Nitrogen tridentate ligands |
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