A summary of the characterization data obtained for the homopolymer PEMA and block copolymer PEMA-b-PDMAEA are shown in the Table DPn gives the degree of polymerisation (block length) as calculated via 1 H NMR measurements. Monomer conversion was determined via 1 H NMR. Mn,T shows the theoretical molecular weight calculated via 1 H NMR monomer conversion. Mn shows the number average molecular weight determined via SEC analysis. Ð represents the dispersity of the molecular weight distribution obtained via SEC analysis. Since SEC is inherently incorrect with regards to absolute molecular weights, the individual block lengths were determined via NMR. In Figure , from the 1 H NMR for PEMA, after integrating the peaks with reference to the -CH2CH2 (e) protons associated with the RAFT agent, which is 4 protons per one polymer molecule, the integration for protons in ethyl methacrylate was obtained. Thus, with the integration of the peak corresponding to 3 protons from the -CH3 group (b), gives 225/3 = 75 EMA monomer units per chain.