Titanium complexes bearing carbamato ligands as catalytic precursors for propylene polymerization reactions |
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| Authors: | Mohammad Hayatifar Claudia Forte Guido Pampaloni Yury V. Kissin Anna Maria Raspolli Galletti Stefano Zacchini |
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| Affiliation: | 1. Departimento di Chimica e Chimica Industriale, Università di Pisa, , 56126 Pisa, Italy;2. CNR‐Consiglio Nazionale delle Ricerche, ICCOM, Area della Ricerca, , 56124 Pisa, Italy;3. Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, , Piscataway, New Jersey, 08854‐8087;4. Dipartimento di Chimica Industriale “Toso Montanari”, Università di Bologna, , I‐40136 Bologna, Italy |
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| Abstract: | This report describes propylene polymerization reactions with titanium complexes bearing carbamato ligands, Ti(O2CNMe2)Cl2 ( I ) and Ti(O2CR2)4 [R2 = NMe2 ( II ), NEt2 ( III ) and  ( IV )]. Combinations of these complexes and MAO form catalysts for the synthesis of atactic polypropylene, as confirmed by FT‐IR, DSC and 13C NMR analysis. Effects of main reaction parameters on the catalyst activity were studied including the type of complex, solvent, temperature, and the [Al]/[Ti] molar ratio. The highest activity was observed when chlorobenzene was used as a solvent and AlMe3‐depleted MAO was employed as a cocatalyst. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013 , 51, 4095–4102 |
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| Keywords: | catalysts polyolefins poly(propylene) (PP) titanium complex |
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