Fig. 9. Summarized kinetic data (a) histogram of empirical half-lifes of polymers P1+–P4+ at different pH (*dashed line represents detection limit for ¹H NMR experiment). (b) Comparison of P1+, P2+, and P4+ at a single pH 6.5. (c) Data comparing degradation of P4+ at pH 5.1, 6.5 and 7.0.