Ethylene/1 -Pentene copolymers synthesized using the Metaloxycarbene complex catalyst system [(CO)5W=C(Me)OZr(Cp)2Cl]/MAO
Date
2004
Authors
Luruli N.
Grumel V.
Brull R.
Toit A.D.U.
Pasch H.
Van Reenen A.J.
Raubenheimer H.G.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Ethylene/1-pentene copolymers were prepared using a [(CO)5W= C(Me)OZr(Cp)2Cl] (1)/MAO catalyst system. 1-Pentene incorporation in the copolymer was monitored using 13C-NMR spectroscopic methods. The weight average molecular weights (Mw) of the copolymers were between 142,000 and 629,000 g/mol, with polydispersity indexes (PDIs) ranging from ≈ 2 to 90, as analyzed by size exclusion chromatography (SEC). Melting and crystallization temperatures, determined using differential scanning calorimetry (DSC) and crystallization analysis fractionation (CRYSTAF), decreased linearly as the amount of 1-pentene in the copolymer increased. SEC-FTIR revealed that the 1-pentene is predominantly incorporated in the low molecular weight fraction. © 2004 Wiley Periodicals, Inc.
Description
Keywords
Catalysts, Charge coupled devices, Crystallization, Molecular weight, Size exclusion chromatography, Synthesis (chemical), Ligand structures, Polymer formation, Polymerization catalysts, Copolymers
Citation
Journal of Polymer Science, Part A: Polymer Chemistry
42
20
42
20