The living character of the visible light induced LRP of acrylates was further demonstrated by chain extension and synthesis of novel multiblock copolymers. Sequential
addition of monomers after desired conversion of certain monomer was reached gave various block copolymers. The detailed polymerization procedure is described in the
Supporting Information. For example, a well-defined acrylate−acrylamide hybrid tetrablock copolymer PMA-b-PnBA-b-PDMA-b-PtBA was prepared. GPC traces showed a clear shift
to higher molecular weight as block copolymerization proceeded (Figure 12).