Other Two-Step Methods for the Synthesis of Macromonomers

The reaction of an unsaturated compound with an antagonist function located at the end of a polymer chain is still the most commonly used method to synthesize macromonomers. We have already mentioned some processes that can be used to introduce into the chain end of a macromolecule a functional group, e.g. by deactivation of living carbanionic sites and transfer reactions of various kinds in cationic polymerization. We have also described some methods used to link an active terminal double bond to the chain end originally bearing hydroxy groups. 

We shall discuss in this section alternatives for synthesizing quantitatively co-functional polymers and which allow at least some kind of control of the molecular weight of the species formed. These polymers can thus serve as precursors for macromonomer synthesis. 

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