In this communication, we describe a simple and highly efficient route to well-defined multi-block star copolymers based on copper(0)-mediated living radical polymerization. The technique involves a core first approach using a multi-functional initiator in connection with iterative copper(0)-mediated radical polymerization steps. Importantly, purification is not required between the successive chain extension steps as complete monomer conversion is reached before the addition of each consecutive monomer type.
Boyer, C., Derveaux, A., Zetterlund, P. B., & Whittaker, M. R. (2012). Synthesis of multi-block copolymer stars using a simple iterative Cu(0)-mediated radical polymerization technique. Polymer Chemistry, 3(1), 117 - 123. https://doi.org/10.1039/c1py00384d