Effect of ligand in ethylene/styrene copolymerization by [Me2Si(C5Me4)(NR)]TiCl2 (R = tert-Bu, cyclohexyl) and (1,3-Me2 C5H3) TiCl2(O-2,6- iPr2C6H3)-MAO catalyst system

Kotohiro Nomura, Hiroshi Okumura, Takashi Komatsu, Naofumi Naga, Yukio Imanishi

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Copolymerization of ethylene with styrene using linked cyclopentadienyl-amide titanium(IV) complexes, [Me2Si(C5Me4) (R)]TiCl2 [R = tert-Bu (1), cyclohexyl (2)], and non-bridged (1,3-Me2 C5H3) TiCl2(O-2,6-iPr2C6H3) (3)-MAO catalysts have been explored. Although the catalytic activity by 2 was lower than 1, 2 showed more efficient styrene incorporation than 1 under the same conditions. Moreover, the resultant copolymer prepared by 2 possessed completely different microstructure from those by 1, indicating that the nature of amide ligand affects both styrene incorporation and monomer sequence.

Original languageEnglish
Pages (from-to)225-234
Number of pages10
JournalJournal of Molecular Catalysis A: Chemical
Volume190
Issue number1-2
DOIs
Publication statusPublished - 2002 Dec 2

Keywords

  • Constrained geometry catalyst
  • Ethylene/styrene copolymerization
  • Titanium

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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