Effect of Ga- and BCl3-modified silica-supported [t-BuNSiMe2(2,7-t-Bu2Flu)]TiMe2/MAO catalyst on ethylene/1-hexene copolymerization

► t-BuNSiMe2(2,7-t-Bu2Flu)]TiMe2 supported on BCl3-modified SiO2 increases activity. ► Molecular weight of PE significantly increases with BCl3 modification. ► Heterogeneous system acts like the homogeneous one with BCl3 modification.