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Titanium-biphenoxide catalysts for ethylene polymerization

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Abstract

Titanium (IV) complexes containing sterically bulky ligands such as 2, 2′- methylenebis (4-methyl-6-tert butyl phenol) (MBTP) were synthesized by stoichiometric reaction between Ti(IV)alkoxide or halide and the biphenol. These catalyst precursors formulated as [Ti(O^O)RR′] were characterized by physicochemical and spectroscopic methods. The newly prepared Titanium biphenoxides were found to be active in polymerization of ethylene at high temperatures and pressures in combination with ethylaluminum sesquichloride (Et3Al2Cl3) as co-catalyst. The linear polyethylene obtained by this route exhibit low-molecular weights, are highly crystalline and display narrow polydispersities. The physical properties of polymers thus obtained closely resemble specialty PE waxes that are industrially important for surface coating, ink formulations and mar resistance applications.

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Acknowledgments

One of the authors (AMM) gratefully acknowledges the management of Reliance Industries Limited for use of its technical facility and the Head, Department of Applied Chemistry, S. V. National Institute of Technology, Surat for supporting this work. The authors also thank the Regional Sophisticated Instrumentation Centre, IIT Mumbai and Central Drug Research Lab., Lucknow for NMR and FAB mass spectral analysis.

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Authors and Affiliations

  1. Applied Chemistry Department, S. V. National Institute of Technology, Surat, 395 007, India

    Akshay Mehta & Girish Mehta

  2. Reliance Technology Group, Vadodara Manufacturing Division, Reliance Industries Limited, Vadodara, 391 346, India

    Gopal Tembe

  3. Ras Tanura Refinery Laboratory, Saudi Aramco, Ras Tanura, 31311, Saudi Arabia

    Prashant Umare

  4. Department of Chemical Technology and Polymer Chemistry, Faculty of Chemistry, Opole University, Oleska 48, 45-052, Opole, Poland

    Marzena Białek

  5. Chemical Engineering Department, S. V. National Institute of Technology, Surat, 395 007, India

    Parimal Parikh

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  1. Akshay Mehta
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  2. Gopal Tembe
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  3. Prashant Umare
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  4. Marzena Białek
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  5. Parimal Parikh
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  6. Girish Mehta
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Correspondence to Gopal Tembe.

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Mehta, A., Tembe, G., Umare, P. et al. Titanium-biphenoxide catalysts for ethylene polymerization. J Polym Res 19, 17 (2012). https://doi.org/10.1007/s10965-012-0017-0

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