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Ethene Co‐ and Terpolymerizations with TIBA‐Protected Norbornenemethanol and TIBA‐Protected Norbornenecarboxylic Acid Using Homogeneous Metallocene/MAO Catalyst Systems
Author(s) -
Wendt Ralf Alexander,
Fink Gerhard
Publication year - 2002
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20020501)203:8<1071::aid-macp1071>3.0.co;2-0
Subject(s) - metallocene , comonomer , polymer chemistry , post metallocene catalyst , polymerization , monomer , chemistry , homogeneous , catalysis , polymer , copolymer , norbornene , homogeneous catalysis , ligand (biochemistry) , organic chemistry , physics , thermodynamics , biochemistry , receptor
Ethene copolymerizations were carried out with triisobutylaluminum (TIBA)‐protected norbornenemethanol and norbornenecarboxylic acid, respectively, using homogeneous metallocene/MAO catalyst systems. Moreover, ethene terpolymerizations with both polar norbornene derivatives were investigated for the first time. The metallocenes utilized, such as i Pr[CpInd]ZrCl 2 , i Pr[(3‐ i Pr‐Cp)Ind]ZrCl 2 , and i Pr[(3‐ tert ‐But‐Cp)Ind]ZrCl 2 contain ligand frameworks of various sterical demands. The incorporation of polar monomers into the polymer chain was determined by NMR spectroscopic investigations. Kinetic and analytical results of the polymerization experiments revealed increasing activities and a decreasing comonomer incorporation into the polymer chain with an increasing sterical demand of the metallocene ligand. Additionally, the TIBA‐protected norbornenecarboxylic acid shows a lower incorporation rate into the copolymer chain in comparison with the TIBA‐protected norbornenemethanol.