Kinetics of sunflower oil methanolysis catalyzed by polymeric networks at 70°C. Initial effective oil and methanol concentrations were 0.73 and 10.3 M, respectively; effective catalyst concentration in all experiments was 14 mg/mL, which corresponds to ca. 42, 180, and 65 mM in the case of XL-PHMBG M1 and M2, XL-PEI, and XL-PVG, respectively. Experiments were conducted in triplicate and standard deviations are shown. Ft denotes the conversion degree (eqn (2)).