Sequence Regulated Poly(ester-amide)s Based on Passerini Reaction

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Abstract
Multicomponent polymerization based on Passerini reaction is described. Room temperature polymerization of dicarboxyl acid, monoaldehyde, and diisocyanide leads to the formation of a new type of sequence regulated poly(ester-amide)s in an efficient one-pot process. The polymerization was confirmed to be a stepwise mechanism, and the resulting polymers were characterized and determined to be linear polymers with a sequence regulated backbone repeating unit of ester–ester–amide–amide. When functional aldehydes were used, functional side groups could be easily introduced at the same time, providing a simple way for further modification.

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