Fig. 10: Organocatalytic synthesis and postpolymerization modification of methionine-containing PEAs (reprinted from ref. 74 with permission from American Chemical Society).

Organocatalytic polymerization process, where methionine-containing monomers are polymerized using an organocatalyst to form the PEA backbone, and the postpolymerization modification of the PEA, where the methionine side chains are chemically modified to introduce functional groups, enabling further tailoring of the material properties.