Keywords: ایزوتاکتیک; Metallocene; Isotactic; Syndiotactic; Polypropylene; Hybrid catalysts; Physical mixtures; [CAT-B]; Me2Si(2-Me-benz[e]Ind)2 ZrCl2 as an isotactic catalyst precursor; [CAT-C]; Ph2C(Cp)(9-Flu)ZrCl2 syndiospecific as a syndiotactic catalyst precursor; [iPP-B]