Fig. 12. (a) Plot of the percent conversion of hydroxyethyl ester repeat units of P3+ (black circles) and percent yield of 10 (black triangles). Simulations with optimized rate constants are also plotted: S1 (blue dashed lines, k₅ = k_h = 1.44 × 10⁻³ min⁻¹); S2 (red solid lines, k_5a = 2.02 × 10⁻³ min⁻¹, k_5u = 6.06 × 10⁻⁵ min⁻¹, k_ha = 1.62 × 10⁻³ min⁻¹, k_hu = 2.46 × 10⁻⁵ min⁻¹). (b) Scheme of degradation processes and rate constants used in simulations.