The polymer synthesis and workup procedures were carried out as described elsewhere. A more detailed description can be found in the Supporting Information (Figure -S4, Table -S4). Briefly, the methyl triflate was added to a dried and nitrogen-flushed Schlenk flask and dissolved in the respective amount of benzonitrile. The monomer 2-methyl-2-oxazoline was added, and the reaction mixture was heated to 120 °C and stirred until complete consumption of the monomer. The reaction was monitored by 1 H NMR spectroscopy. After full consumption of MeOx, the mixture was cooled to room temperature and the monomer for the second block, 2-n-butyl-2-oxazine or 2-n-butyl-2-oxazoline, was added. The mixture was heated to 130 °C overnight. The same procedure was repeated for the third block (MeOx).