Synthesis and characterization of random and regular L-lysine-based polyamides

This paper deals with the synthesis of polyamides based on the natural diamine, L‐lysine, on the one hand, and diacids, adipic or glutaric, on the other hand. They were obtained by polycondensation of active diesters, pentachlorophenyl and pentafluorophenyl esters. L‐Lysine being non‐symmetrical, aregic (random) and syndioregic (“head‐to‐head, tail‐to‐tail”) poly(adipoyl‐L‐lysine)s and poly(glutaroyl‐L‐lysine)s were obtained with molecular weights higher than 15000; isoregic (“head‐to‐tail”) poly(adipoyl‐L‐lysine)s and poly(glutaroyl‐L‐lysine)s were prepared with lower molecular weights.