Increasing the temperature to 150 °C resulted in monomer consumption but apparently led to unwanted side reactions. To the best of our knowledge, the synthesis of ABA triblock copolymers comprising PentOzi as hydrophobic block was not published before, so no comparison to literature could be done. However, it is known that 2-oxazines suffer from more transfer reactions compared to 2-oxazolines. Table . Overview showing the polymer characteristics of the polymers A-PentOx-A, A-BuOx-A, A-PentOzi-A and A-BuOzi-A, including the theoretical molecular weight (Mw, theo.), the molecular weight determined by 1 H NMR spectroscopy (Mn, NMR) and SEC (Mn, SEC) and the dispersity (Ð) of the polymers determined by SEC.