Abstract

Recent progress in the reaction control of condensation polymerization is described. In the past, the reactions in condensation polymerization had been improved for the purpose of production of high molecular weight polymer with more convenient methods. In recent years, chemoselective, regioselective, and stereoselective condensation polymerizations have been developed. Furthermore, it has been revealed that most condensation polymerizations possess the fundamental tendency to yield cyclic polymers as stable end products when the reactions are optimized for quantitative reaction. When the reactivity of a functional group of a monomer was enhanced after the other functional group of the monomer was reacted, condensation polymerization of AA and BB monomers afforded polymer with high molecular weight, even under nonstoichiometric conditions, and condensation polymerization of AB monomer involved a chain-growth polymerization mechanism to yield polymer with narrow molecular weight distribution.

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