CONCLUSION

The present study aimed to evaluate the influence of number of active catalytic sites in molar distribution of polybutadiene. 1,3-butadiene polymerizations were performed successfully in Aspen Plus 10 considering 1, 2, 3 and 4 catalytic sites.
It was concluded that temperature and pressure profiles are practically not changed with a variation in the number of sites. Such profiles show an increase until reaching a peak and then stabilize, showing similarity with those already reported in the literature.
Comparing values of \(M_{n}\), \(M_{w}\) and PDI it can be confirmed they are directly related with the grow of number of active sites. Values of \(M_{n}\) range from 3.6x104 to 1.4x105, \(M_{w}\) range from 7.3x104 to 7.4x105 and PDI range from 2.02 to 5.24. Besides that, graphs generated shows that the dispersity increase with the variation and MWD is dislocated to the right side.