The monomers 2-methyl-2-oxazine (MeOzi) and 2-pentyl-2-oxazoline (PentOx) were synthesized following the procedure by Witte and Seeliger. Detailed information about the synthesis can be found in the supporting information (Table -2 and Figure ). Briefly explained, the respective nitrile, 3-amino-propanol for the synthesis of the 2-oxazines or 2-amino-ethanol for the synthesis of the 2-oxazolines, and catalytic amounts of zinc acetate dihydrate were mixed in a N2 flushed flask and heated to 130°C under reflux for two days. The progress was controlled by 1 H NMR spectroscopy. After completion of the reaction, the PentOx mixture was dissolved in dichloromethane and washed with H2O three times. The organic phase was dried with Na2SO4 and concentrated. The raw product was dried over CaH2 and distilled under reduced pressure under N2 atmosphere to yield the product as a colourless liquid. MeOzi was distilled directly out of the reaction mixture after completion of the reaction.