The complete list of the elementary reactions and kinetic parameters for the modeling of the co-and terpolymerizations is provided in Supporting Information. For plotting of monomer sequences, we only depict maximally 200 chains out of the ensemble with millions of monomer units, with the monomer units colored as defined in Figure , i.e. blue for an MMA unit, green for a DOT unit, and red for an auxiliary monomer unit being either based on MA or PhMal. -terminal saturated unit (a product of disproportionation or chain transfer to monomer). In subplot a, also a simulated concentration dependency for DOT (orange line), consistent with the weak UV signal in Figure .