PLA–Pluronic–PLA and PLA–Tetronic–PLA block copolymers were synthesized following a procedure previously described by our group [25]. Typically, predetermined amounts of LA and Pluronic or Tetronic were introduced into a flask, and Sn(Oct)2 (0.1 molar % with respect to LA units) was then added. After degassing, the flask was sealed under vacuum, and polymerization was allowed to proceed at 110 °C. After 5 days, the copolymer was recovered by dissolution in DCM and precipitation in cold diethyl ether. Finally, the product was dried under reduced pressure to constant mass. The copolymers were obtained with an average yield of 86% (43 g).