University of SaskatchewanHARVEST
  • Login
  • Submit Your Work
  • About
    • About HARVEST
    • Guidelines
    • Browse
      • All of HARVEST
      • Communities & Collections
      • By Issue Date
      • Authors
      • Titles
      • Subjects
      • This Collection
      • By Issue Date
      • Authors
      • Titles
      • Subjects
    • My Account
      • Login
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      View Item 
      • HARVEST
      • Electronic Theses and Dissertations
      • Graduate Theses and Dissertations
      • View Item
      • HARVEST
      • Electronic Theses and Dissertations
      • Graduate Theses and Dissertations
      • View Item

      New catalysts for olefin polymerization

      Thumbnail
      View/Open
      SAMUELSUNDAYHANSON.pdf (1020.Kb)
      Date
      2010
      Author
      Hanson, Samuel Sunday
      Type
      Thesis
      Degree Level
      Masters
      Metadata
      Show full item record
      Abstract
      Aluminum- and gallium-bridged ansa-zirconocene compounds (Pytsi)Al[1]ZCP (31a) and (Pytsi)Ga[1]ZCP (31b) containing a bulky trisyl-based ligand with a pyridyl donor group [Pytsi = -C(SiMe3)2SiMe2(2-C5H4N)] were synthesized in 31% and 40% yield, respectively, by the reaction of (Pytsi)ECp2 [E = Al (29a), Ga (29b)] with Zr(NMe2)4 followed by reaction with Me3SiCl. Compounds 29a and 29b were prepared by the reaction of (Pytsi)ECl2 [E = Al (28a), E = Ga (28b)] with two equivalents of NaCp. The molecular structures of 29a and 29b were elucidated in solution by 1H and 13C NMR spectroscopy. Species 31a was characterized by multinuclear NMR spectroscopy while 31b was characterized by CHN elemental analysis, 1H and 13C NMR spectroscopy and mass spectrometry. Both species are the only known examples of aluminum- and gallium-bridged ansa-zirconocenes. Compound 31b in combination with MAO was applied and shown to be highly active for ethylene polymerization at room temperature. The activity of 31b was compared to that obtained for Cp2ZrCl2 using a glass reactor system and was found to be comparable. The influence of precatalyst concentration and ethylene pressure on activity of 31b was studied.
      Degree
      Master of Science (M.Sc.)
      Department
      Chemistry
      Program
      Chemistry
      Supervisor
      Mueller, Jens
      Committee
      Foley, Stephen; Mohammadzadeh, Soltan C.
      Copyright Date
      2010
      URI
      http://hdl.handle.net/10388/etd-07212010-000654
      Subject
      olefin polymerization
      amine elimination
      catalysts
      gallium
      ansa-zirconocene
      aluminum
      Collections
      • Graduate Theses and Dissertations
      University of Saskatchewan

      University Library

      The University of Saskatchewan's main campus is situated on Treaty 6 Territory and the Homeland of the Métis.

      © University of Saskatchewan
      Contact Us | Disclaimer | Privacy