Abstract
Various explanations and/or models for the reaction mechanisms of the Ziegler-Natta polymerization process are cited. The large primary kinetic isotope effect that is implied by hydrogen migration in the mechanism of this polymerization has been investigated. k/sub H//k/sub D/ values for these various reaction schemes are also cited. For the copolymerization of ethylene and perdeuterioethylene (the system reported in some detail herein), it was concluded that the data strongly suggest an insertion mechanism that does not involve hydrogen migration as the rate-determining step. (BLM)
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