title: Fourier transform ion mobility measurement of chain branching in mass-selected, chemically trapped oligomers from methylalumoxane-activated, metallocene-catalyzed polymerization of ethylene.
abstract: Fourier transform ion mobility spectrometry is used to determine the branching in mass-selected, chemically trapped oligomers produced in the polymerization of ethylene by a metallocene catalyst activated by methylalumoxane. The measured branching is included in a kinetic analysis to extract the activation energies for the elementary steps in polyethylene formation. Propagation, chain transfer, and chain walking have activation energies of 4.1, 11, and 11 kcal/mol.
authors.affiliation: Laboratorium für Organische Chemie, ETH Zürich, Switzerland.
authors.forename: Rolf
authors.initials: R
authors.lastname: Dietiker
authors.forename: Fabio
authors.initials: F
authors.lastname: di Lena
authors.forename: Peter
authors.initials: P
authors.lastname: Chen