Influence of the Ethanol Content of Adduct on the Comonomer Incorporation of Related Ziegler-Natta Catalysts in Propylene (Co)polymerizations.

The aim of this work is to investigate the influence of the ethanol content of adducts on the catalytic behavior of related Ziegler-Natta (ZN) catalysts in propylene homo- and copolymerizations (with 1-hexene comonomer) in terms of activity, isotacticity, H response, and comonomer incorporation. For this purpose, three MgCl.nEtOH adducts with n values of 0.

Correlation of Microstructure, Rheological and Morphological Characteristics of Synthesized Polypropylene (PP) Reactor Blends Using Homogeneous Binary Metallocene Catalyst.

A novel binary homogeneous catalyst system based on (I): -Me₂Si(2-Me-4-PhIn)₂ZrCl₂ and (II): (2-PhIn)₂ZrCl₂ catalysts at various molar ratios was utilized for the synthesis of polypropylene (PP) reactor blends with bimodal molecular weight distribution (MWD). The results of gel permeation chromatography analyses revealed that the catalyst (I) was responsible for the production of -PP with high molecular weight (MW) while the individual use of catalyst (II) led to the production of an elastomeric PP with relatively low MW. However, application of the binary catalyst system led to high MW bimodal MWD products being highly dependent on the catalysts' molar ratios.

(E)-2-tert-Butyl-6-[(naphthalen-1-yl)imino-meth-yl]phenol.

The asymmetric unit of the title Schiff base compound, C(21)H(21)NO, contains two crystallographicaly independent mol-ecules. The dihedral angles between the naphthalene mean plane and the benzene ring are 29.28 (8) and 26.

2-tert-Butyl-6-(cyclo-hexyl-imino-meth-yl)-4-meth-oxy-phenol.

The asymmetric unit of the title Schiff base compound, C(18)H(27)NO(2), contains two independent mol-ecules in which the C=N bond lengths are 1.278 (2) and 1.280 (2) Å and the cyclo-hexane rings adopt chair conformations.