PCL(3k)-PEG(3k)-VS is a diblock copolymer which can react with thiol via thiol-ene reaction in the presence of radical initiator. The polymer is amphiphilic with polycaprolactone (PCL) and PEG as hydrophobic and hydrophilic blocks, respectively. In water, the polymer self-assembles to form micelles which can be used to encapsulate hydrophobic drugs. Reagent grade, for research purpose.