of the metallocene catalyst in situ on the Ziegler–Natta catalyst, asoutlined in Scheme 1. Fig. 2 summarizes the characterization resultsof the resultant bimetallic “two-in-one” catalyst. A compositionalanalysis first reveals that there are both Ti and Zr metals present,whose contents are measured at 1.74 wt% and 0.56 wt%, respec-tively. While BMMF content is decreased by 3.3 wt% to 12.9 wt%, Alis found to account for 15.9 wt% of the composition of the catalyst. The overall particle morphology of the catalyst remains all butintact, with still a spherical particle outer appearance and porousinner structure. Intriguingly, it is found that the bimetallic catalystexhibits a much greater porosity as compared to its predeces-sor MgCl2/TiCl4/BMMF catalyst. This implies that complexing withMAO and rac-CH2(3-t-Bu-1-Ind)2ZrCl2may somehow loosen thepacking of the -MgCl2crystals so as to generate more pores whichhowever become thinner due to those complexants.