Block copolymerization of 2-Hydroxy ethyl acrylate (HEA) was performed using classical batch mode RAFT polymerization. In a 100 mL round bottom flask, 33 mmol (4 g, 120 equiv., 0.7 M) of monomer HEA, 0.28 mmol (3.5 g, 1 equiv.) of the PS macro-RAFT agent synthesized and 0.014 mmol (0.002 g, 0.05 equiv.) of AIBN were dissolved in 45 mL of DMF. A sample from this initial solution was dissolved in CDCl3 and was measured as the to sample in 1H NMR spectrometer. Subsequently, the flask was purged with argon gas for 30 minutes. The solution was left to react at 70 °C in an oil bath with magnetic stirring for 3.5 hours. The reaction was quenched by lowering the temperature and by exposing the reaction mixture to air. A sample from the reacted solution was dissolved in CDCl3 and was measured as the tfinal sample in 1H NMR spectrometer.