l-lactide (Puralact B3®) was kindly donated by Corbion Purac (Amsterdam, Netherlands). Tin (II) 2-etilhexanoato (Sn (Oct)2) was purchased from Sigma-Aldrich® Chemicals (Karlsruhe, Germany). Methanol, chloroform and glycerol were purchased from Merck (Darmstadt, Germany). Other reagents...