An examination of aluminum chain transfer reaction in rac-Me2Si[2-Me-4-Naph-Ind]2ZrCl2/MAO-catalyzed propylene polymerization and synthesis of aluminum-terminated isotactic polypropylene with controlled molecular weight

1H NMR spectra of polypropylenes prepared at 10 °C with Al/Zr ratio of (a) 10000, (b) 5000, (c) 1500 and (d) 500.