Diblock Polyelectrolyte Synthesis: DbPEs were prepared and functionalized following the same protocol used for the TbPE synthesis except for replacing the initiator PEO by poly(ethylene glycol) monomethyl ether (Mn = 5,000 g•mol -1 ). The degree of polymerization of the PAGE block was calculated from the relative peak intensities in the NMR spectra, yielding mPEO113-PAGE45.