bromoisobutyryl bromide. Surface initiated ATRP of thymylmethacrylate was performed in solution in the presence of a sacrificial initiator. The efficiency of these reactions was confirmed by X‐ray photoelectron spectroscopy. Wetting properties and surface energy were found to vary systematically depending to the type of functionalization and grafting. The poly(thymylmethacrylate)‐grafted PET surfaces exhibit resistance