For non-radical pathways, the influence of O 2 is marginal, as the concentration of monomers in the absorbed liquid remains similar to that in the bulk liquid, which predominantly depends on the convective flows, similar to the previously published base case (zero oxygen) scenario. However, for radical pathways, O 2 has a much larger impact because the concentration of participating radicals in the absorbed liquid is primarily governed by diffusive fluxes and liquid+liquid reactions. The liquid+liquid reactions affecting the radical concentrations in the bulk liquid include both oligomerization and autoxidation.