Scheme 1. Synthesis Route of ABC Triblock Copolymers Using the Heterofunctional PEG Macroinitiator (1); in the First Step, the First Block, Represented by A, Is Synthesized by Atom Transfer Radical Polymerization (ATRP) (2); in the Next Step, the Final Block, Represented by C, Is Synthesized by Free Radical Polymerization (FRP) (3).