Cycloaliphatic Polymers via Late Transition Metal Catalysis - Late Transition Metal Polymerization Catalysis - page 117

3

Fig. 4.15 Reactive end-groups formed via chain transfer to olefinic monomers using the naked
nickel catalyst.

Fig. 4.16 The direct synthesis of A-B block copolymers using the naked
nickel catalyst with polymeric chain transfer agents.

-olefins. In the case of the palladium analogs, -olefins have little if any effect on

MW, presumably indicating that -olefins cannot compete with norbornene for in-

sertion into the growing palladium-polymer bond.
The extension of this novel chain transfer event to higher molecular weight “ -

olefins” has enabled us, and others, to make unique poly(norbornene) block copo-
lymers [44]. Examples of the diversity of this chain transfer chemistry are given in
Fig. 4.15 where chain transfer to ethylene, allylglycidyl ether, isobutylene, cyclo-