MgC1_2_4((CH_3)_2CHCH_2OH): A new molecular adduct for the preparation of TiCI_x/MgCI_2 catalyst for olefin polymerization

摘要

A new molecular adduct of MgCl_2 with isobutanol, namely MgC1_2 4((CH_3)_2CHCH_2OH) (MgiBOH), has been prepared as a precursor to the supporting material for an olefin polymerization catalyst. The MgiBOH adduct and final titanated Ziegler-Natta catalysts have been thoroughly characterized by powder XRD, thermal analysis, Raman spectroscopy and solid-state NMR for structural and spectroscopy aspects. A peak observed at 712 cm-1 in the Raman spectra of MgiBOH indicates the characteristic Mg-O_6 breathing mode and the formation of the adduct. The diffraction feature at 20 = 7.80 (d = 11.223) in the XRD confirms the adduct formation and the layered structure. The aim of the present article is to study how the insertion of a bulky isobutanol moiety affects the structural and electronic properties of the MgCl_2isobutanol molecular adduct. Indeed, the focus of the present study is to explore how the presence of isobutanol, in the initial molecular adduct, influences the final Z-N catalyst properties and its activity.