Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst
A mono-nuclear catalyst of bis-imine cobalt (MC) was synthesized with using 2,6-dibenzhydryl-4-ethoxy phenyl as a ligand. The so huge ligand was prepared via the reaction of 2,6-dibenzhydryl-4-ethoxy phenyl)-N=(CH3)-C(CH3)=O with diacetyl with equal mole stoichiometry in presence of formic acid cata...
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| Format: | Article |
| Language: | English |
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Iran Polymer and Petrochemical Institute
2023-05-01
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| Series: | Polyolefins Journal |
| Subjects: | |
| Online Access: | http://poj.ippi.ac.ir/article_1943_1e4ff750822ec36167f0338ee25ccf17.pdf |
| _version_ | 1797812614276841472 |
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| author | Majedeh Maroofi Gholam Zohuri Saeid Ahmadjo Navid Ramezanian |
| author_facet | Majedeh Maroofi Gholam Zohuri Saeid Ahmadjo Navid Ramezanian |
| author_sort | Majedeh Maroofi |
| collection | DOAJ |
| description | A mono-nuclear catalyst of bis-imine cobalt (MC) was synthesized with using 2,6-dibenzhydryl-4-ethoxy phenyl as a ligand. The so huge ligand was prepared via the reaction of 2,6-dibenzhydryl-4-ethoxy phenyl)-N=(CH3)-C(CH3)=O with diacetyl with equal mole stoichiometry in presence of formic acid catalysis. The catalyst was synthesized via a reaction between the ligands and cobalt salt (CoCl2). The catalyst was used for polymerization of methyl methacrylate (MMA), (a polar monomer) in the presence of modified methylaluminoxane (MMAO). The highest polymerization activity (8.6 g PMMA/mmol cat. h) was obtained at [cocatalyst]/[catalyst]=1000:1 molar ratio and at room temperature reaction. For the prepared PMMA, Polymer with branching density of 263/1000C was obtained using 1H NMR technique calculation. The microstructure of one of the produced PMMA was as follow: 48% syndiotactic, 29% isotactic and 23% atactic. GPC analysis of the polymer showed a number average molecular weight of about 5.7 × 105 g/mol and a narrow molecular weight distribution of 1.57. |
| first_indexed | 2024-03-13T07:41:01Z |
| format | Article |
| id | doaj.art-c6e006827d144346855fc2d95d4beb1c |
| institution | Directory Open Access Journal |
| issn | 2322-2212 2345-6868 |
| language | English |
| last_indexed | 2024-03-13T07:41:01Z |
| publishDate | 2023-05-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | Polyolefins Journal |
| spelling | doaj.art-c6e006827d144346855fc2d95d4beb1c2023-06-03T08:58:40ZengIran Polymer and Petrochemical InstitutePolyolefins Journal2322-22122345-68682023-05-01102798810.22063/poj.2023.3341.12571943Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalystMajedeh Maroofi0Gholam Zohuri1Saeid Ahmadjo2Navid Ramezanian3Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, P.O. Box 91775, Mashhad, IranDepartment of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, P.O. Box 91775, Mashhad, IranDepartment of Engineering, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, IranDepartment of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, P.O. Box 91775, Mashhad, IranA mono-nuclear catalyst of bis-imine cobalt (MC) was synthesized with using 2,6-dibenzhydryl-4-ethoxy phenyl as a ligand. The so huge ligand was prepared via the reaction of 2,6-dibenzhydryl-4-ethoxy phenyl)-N=(CH3)-C(CH3)=O with diacetyl with equal mole stoichiometry in presence of formic acid catalysis. The catalyst was synthesized via a reaction between the ligands and cobalt salt (CoCl2). The catalyst was used for polymerization of methyl methacrylate (MMA), (a polar monomer) in the presence of modified methylaluminoxane (MMAO). The highest polymerization activity (8.6 g PMMA/mmol cat. h) was obtained at [cocatalyst]/[catalyst]=1000:1 molar ratio and at room temperature reaction. For the prepared PMMA, Polymer with branching density of 263/1000C was obtained using 1H NMR technique calculation. The microstructure of one of the produced PMMA was as follow: 48% syndiotactic, 29% isotactic and 23% atactic. GPC analysis of the polymer showed a number average molecular weight of about 5.7 × 105 g/mol and a narrow molecular weight distribution of 1.57.http://poj.ippi.ac.ir/article_1943_1e4ff750822ec36167f0338ee25ccf17.pdfbis-imine cobalt catalysispolymethyl methacrylatepolymerizationtacticity |
| spellingShingle | Majedeh Maroofi Gholam Zohuri Saeid Ahmadjo Navid Ramezanian Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst Polyolefins Journal bis-imine cobalt catalysis polymethyl methacrylate polymerization tacticity |
| title | Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst |
| title_full | Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst |
| title_fullStr | Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst |
| title_full_unstemmed | Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst |
| title_short | Polymerization of methyl methacrylate using bis(imine)cobalt, a polyolefin catalyst |
| title_sort | polymerization of methyl methacrylate using bis imine cobalt a polyolefin catalyst |
| topic | bis-imine cobalt catalysis polymethyl methacrylate polymerization tacticity |
| url | http://poj.ippi.ac.ir/article_1943_1e4ff750822ec36167f0338ee25ccf17.pdf |
| work_keys_str_mv | AT majedehmaroofi polymerizationofmethylmethacrylateusingbisiminecobaltapolyolefincatalyst AT gholamzohuri polymerizationofmethylmethacrylateusingbisiminecobaltapolyolefincatalyst AT saeidahmadjo polymerizationofmethylmethacrylateusingbisiminecobaltapolyolefincatalyst AT navidramezanian polymerizationofmethylmethacrylateusingbisiminecobaltapolyolefincatalyst |