Synthesis of ArOTiCl3 complexes and their application for ethylene polymerization and copolymerization

Jianwei Wang , Yingchun Ren , Sheng Xu , Puke Mi

Abstract

In this article, novel olefin polymerization catalyst with lower cost and simple synthetic process were developed, ArOTiCl3 complexes [(2-OMeC6H4O)TiCl3(C1), (2,4-Me2C6H3O)TiCl3(C2), TiCl3(1,4-OC6H4O)TiCl3 (C3), TiCl3(1,4-OC6H2O-Me2-2,5) TiCl3(C4)] and corresponding (ArO)2TiCl2 complexes [TiCl2(OC6H4-OMe-2)2(C5) and TiCl2(OC6H3-Me2-2,6)2(C6)] have been synthesized by the reaction of TiCl4 with phenol, all these complexes were well characterized with 1H NMR,13C NMR, MASS and EA. When combined with methylaluminoxane (MAO), the ArOTiCl3 / MAO system shows high activity for ethylene copolymerization with 1-octene and copolymer was obtained with broaden molecular weight distribution (MWD). The 13C NMR result of polymer indicates that the 1-octene incorporation in polymer reached up to 8.29 mol%. The effects of polymerization temperature, concentration of polymerization monomer and polymerization time on the catalytic activity have been investigated.

Key Words

ArOTiCl3 complex; catalyst; ethylene/1-octene; copolymerization

Address

(1) Jianwei Wang, Sheng Xu, Puke Mi — School of Materical Science and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China
(2) Yingchun Ren, Sheng Xu — School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P.R. China.

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