In order to separate the synergistic effects of monomer bulkiness and charge density, in Figure ) we fixed the size of monomeric units to σ mon = 1.00σ ≈ 0.35 nm and we varied only the bond length, yielding the same range of charge densities as in Figure ) while keeping the steric repulsion unchanged. Our results in Figure ) show that a decrease in the charge density shrinks the phase separation region, as predicted by theories and observed in experiments.