After successful homopolymers preparation, we expanded our synthetic library to the ABA triblock copolymers comprising pMeOx as hydrophilic blocks A, and p R EtEtOx, p S EtEtOx, p RS EtEtOx, p R PrMeOx, p S PrMeOx and p RS PrMeOx as hydrophobic blocks B. As the hydrophilic blocks A are common in all polymers, they were labelled according to their hydrophobic blocks A-p R EtEtOx-A, A-p S EtEtOx-A, A-p RS EtEtOx-A, Ap R PrMeOx-A, A-p S PrMeOx-A and A-p RS PrMeOx-A, respectively. All triblock copolymers were characterized by 1 H-NMR spectroscopy and GPC (Fig. -13 and Table ). All the polymers exhibited excellent solubility in water and ethanol (solubility > 200 g/L).