Materials and Methods: All substances and reagents for the monomer synthesis and polymerization were purchased from Sigma-Aldrich (Steinheim, Germany) or TCI-chemicals (Eschborn, Germany) and were used as received unless otherwise stated. Deuterated solvents for NMR analysis were obtained from Deutero GmbH (Kastellaun, Germany). All substances used for polymerization, specifically methyl trifluoromethylsulfonate (MeOTf), MeOx, PheOzi and BuOzi were refluxed over CaH 2 for several hours and distilled prior usage. The solvent benzonitrile (PhCN) was dried over phosphorus pentoxide. All dried reagents were stored under dry and inert conditions.