There are two possible pathways in which dissolved oxygen can accelerate film growth in the cold section. The first one is through the solid-bound radical pathways. Under an anaerobic condition, there are two types of solid-bound radical reactive sites: the allylic radical reactive site (AR) and the alkyl radical reactive site (KR). With dissolved oxygen, there is enough dissolved oxygen within the film initially. Some of these carbon-center solidbound radicals rapidly combine with an oxygen molecule and convert into peroxyl radical reactive site (PR). All of these solid-bound radicals can convert to one another through propagation reactions with conjugated diene monomers. The monomer concentrations within the film stay similar to those in the bulk liquid. The relatively high concentration of dissolved oxygen and less availability of loosely bonded allylic hydrogens in the colder trays (since the dominant species, butadiene, does not have any very weak C-H bonds) generally promote this film growth cycle. However, our quantum calculations show that PR propagates with conjugated diene monomers at similar k's to AR (Fig. ). Additionally, the rate of production analysis shows that the amount of growth caused by a PR (Fig. ) is similar to that of AR (Fig. ). Considering these, the fast growth caused by dissolved oxygen is not through the solid-bound radical pathways.