For the MMA -PhMal pair, there are only a few publications dealing with the determination of their reactivity ratios. In particular Hasan and coworkers Since these r values are of crucial importance for the simulation, we also determined them under the same (overall) experimental conditions than the terpolymerization system (see Supporting Information for details). Reactivity ratios rMMA = 1.94 and rPhMal = 0.9 have been determined (Figure ), highlighting the relevance of this extra experimental work, seeing some deviation with the overall literature range.