4. Conclusions In conclusion, we report in this paper a strategy forcombining Ziegler–Natta and metallocene catalysis to synthe-size broad/bimodal molecular-weight-distribution polypropyl-ene. With a MgCl2/TiCl4Ziegler–Natta catalyst bearing 9,9-bis(methoxymethyl)fluorene as internal electron donor, whichis with a fine spherical, porous particle morphology, rac-[methylene(3-tert-butyl-1-indenyl)2]ZrCl2is able to be absorbedinto the heterogeneous catalyst by simply treating the MgCl2/TiCl4prototype with a MAO complex of the metallocene. The resul-tant bimetallic catalyst is characterized with a still good granularparticle morphology, with the freshly incorporated Zr metaland MAO being intermingled with the pre-existing Ti and the the1,3-diether internal electron donor, as well as the MgCl2support,the structures and compositions of which are both largely intactand in equivalent with before metallocene incorporation. The fullyintegrated “two-in-one” catalyst is found to be best activated bypairing triisobutylaluminium instead of triethylaluminium withMAO for propylene polymerization, when both Ti and Zr can exten-sively express their catalytic activities. Polymerization of propylenewith such a catalyst produces broad/bimodal molecular-weight-distribution PP, which display clearly bimodal profiles in both GPCmolecular weight distribution and DSC melting thermogram. Themolar ratios of high- and low-molecular weight polymer fractionsare tunable via controlling the molar ratio of the additionally addedMAO to Zr in the bimetallic catalyst, which varies the relative activ-ities of the metallocene. At last, because of the well-appreciatedgranular particle morphology of the catalyst, particle morphol-ogy of the reactor products of the broad/bimodal MWD PP isrest-assured, which promises a brilliant future for an industrialapplication of the “two-in-one” catalyst approach to broad/bimodalMWD PP.