Anionic addition polymerization: Difference between revisions

Revision as of 06:49, 10 January 2022

Revision as of 10:21, 19 January 2022

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===End-group functionalization/termination===

One of the remarkable features of living anionic polymerization is the absence of a formal termination step. In the absence of impurities, the carbanion would remainsremain active, awaiting the addition of new monomer. Termination can occur through unintentional quenching by impurities, often present in trace amounts. Typical impurities include [[oxygen]], [[carbon dioxide]], or [[water]]. Termination intentionally allows the introduction of tailored end groups.

Living anionic polymerization allow the incorporation of functional [[end-group]]s, usually added to quench polymerization. End-groups that have been used in the functionalization of α-haloalkanes include [[hydroxide]], -NH₂, -OH, -SH, -CHO,-COCH₃, -COOH, and epoxides.