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

In this article, novel olefin polymerization catalyst with lower cost and simple synthetic process were developed, ArOTiCl₃ complexes [(2-OMeC₆H₄O)TiCl₃(<b>C1</b>), (2,4-Me₂C₆H₃O)TiCl₃(<b>C2</b>), TiCl₃(1,4-OC₆H₄O)TiCl₃ (<b>C3</b>), TiCl₃(1,4-OC₆H₂O-Me₂-2,5) TiCl₃(<b>C4</b>)] and corresponding (ArO)₂TiCl₂ complexes [TiCl₂(OC₆H₄-OMe-2)₂(<b>C5</b>) and TiCl₂(OC₆H₃-Me₂-2,6)₂(<b>C6</b>)] 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.