In the 1 H NMR for the block copolymer PS-PPEGMEA, after integrating the peaks with reference to the aryl protons (a) from PS macro-RAFT, which is 450 protons per one block copolymer molecule, the integration for 3 protons from -CH3 group at (d), gives 69/3 = 23 PEGMEA monomer units per block copolymer chain. Hence, the PS-b-PPEGMEA polymer is AIBN were dissolved in 5 mL of toluene. Few drops of DMF were added as an internal standard for 1H NMR analysis. 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 65 °C in an oil bath with magnetic stirring for 50 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. Monomer conversion was calculated using the integral changes at the vinyl peaks of monomer in to and tfinal 1H NMR spectra. The synthesized polymer was purified via precipitation using cold methanol. The final product was dried in vacuo over 24-48 hours.