Fig. 5.

Formation of GICs in bulk as determined with DLS titrations and zeta potential measurements. Left Y axis zeta potential, right Y axis scattering intensity [kHz] divided by the total concentration, c [g/l], of the polymer. (White circles) DLS titration curves of PAA₂₈-co-PAPEO₂₂ with P2MVPI₄₃ (a) and PAH·HCl₁₆₀ (b) in 1 mM NaCl, pH 7, (black circles) zeta potentials of GIC-PAPEO₂₂/P2MVPI₄₃ (a) and GIC-PAPEO₂₂/PAH₁₆₀ (b) measured at various mixing ratios (Emphasis>)) in 1 mM NaCl, pH 7. Lines were added to guide the eye. Instruments settings for DLS titrations, namely the aperture of the detector (pinhole), were different for titration with P2MVPI₄₃ and PAH·HCl₁₆₀. For titration with P2MVPI₄₃, the aperture was 200 μm and for titration with PAH·HCl₁₆₀ the aperture was 400 μm. The pinhole size was increased to improve the signal measured for weakly scattering PAA₂₈-co-PAPEO₂₂ + PAH·HCl₁₆₀ complexes