In the 1 H NMR for the block copolymer PEMA-PDMAEA, after integrating the peaks with reference to the -CH3 (e) protons from PEMA macro-RAFT, which is 225 protons per one block copolymer molecule, the integration for 6 protons from two -CH3 groups at (a), gives 299/6 = 50 DMAEA monomer units per block copolymer chain. Hence, the PEMA-b-PDMAEA polymer is determined to have a block length of 75 of the PEMA block, and 50 for PDMAEA. This chain length is consistent with the obtained SEC results.