Figure 4 Mass distribution of polybutadiene considering only one catalytic site.
It can be seen in Figure 4 that the molar mass distribution considering only a single catalytic site did not present bimodality, as expected, since the presence of only one active center generates only a group of polymers following reactions with fixed kinetic constants. In addition, a polydispersity index of 2.02 is observed, something very similar to a step-growth polymerization process following the Flory distribution, which is expected for a catalyst with only one active center .
The average molar masses are of the order of 3.61x104and 7.31x104 for \(M_{n}\) and\(M_{w}\)­, respectively, which are considered low average molar masses considering a polymerization process in 1,3-butadiene solution . In Figure 5, the process simulation can be seen considering two active centres.