Advances in materials Research

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

  • Wang, Jianwei (School of Materical Science and Molecular Engineering, East China University of Science and Technology) ;
  • Ren, Yingchun (School of Chemistry and Molecular Engineering, East China University of Science and Technology) ;
  • Xu, Sheng (School of Materical Science and Molecular Engineering, East China University of Science and Technology) ;
  • Mi, Puke (School of Materical Science and Molecular Engineering, East China University of Science and Technology)
  • Received : 2017.11.20
  • Accepted : 2018.02.14
  • Published : 2017.09.25
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Abstract

In this article, novel olefin polymerization catalyst with lower cost and simple synthetic process were developed, $ArOTiCl_3$ complexes [$(2-OMeC_6H_4O)TiCl_3(C1)$, $(2,4-Me_2C_6H_3O)TiCl_3(C2)$, $TiCl_3(1,4-OC_6H_4O)TiCl_3(C3)$, $TiCl_3(1,4-OC_6H_2O-Me_2-2,5)$ $TiCl_3(C4)$] and corresponding $(ArO)_2TiCl_2$ complexes [$TiCl_2(OC_6H_4-OMe-2)_2(C5)$ and $TiCl_2(OC_6H_3-Me_2-2,6)_2(C6)$] have been synthesized by the reaction of $TiCl_4$ with phenol, all these complexes were well characterized with $^1H$ NMR, $^{13}C$ NMR, MASS and EA. When combined with methylaluminoxane (MAO), the $ArOTiCl_3/MAO$ system shows high activity for ethylene copolymerization with 1-octene and copolymer was obtained with broaden molecular weight distribution (MWD). The $^{13}C$ 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.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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