Design of postmetallocene catalytic systems of arylimine type for olefin polymerization: XIV. Synthesis of (N-Allyloxyaryl)salicylaldimine ligands and their complexes with titanium(IV) dichloride
摘要:
By reaction of salicylaldehydes with bulky substituents in the positions 3 and 5 with o-, m-, and p-allyloxyaniline hydrochlorides in the presence of triethylamine a series of the corresponding (N-aryl)-salicylaldimines was obtained, which with TiCl2(OPr-i)(2) afforded complexes of titanium(IV) dichloride L2TiCl2.
Design of postmetallocene catalytic systems of arylimine type for olefin polymerization: XIV. Synthesis of (N-Allyloxyaryl)salicylaldimine ligands and their complexes with titanium(IV) dichloride
摘要:
By reaction of salicylaldehydes with bulky substituents in the positions 3 and 5 with o-, m-, and p-allyloxyaniline hydrochlorides in the presence of triethylamine a series of the corresponding (N-aryl)-salicylaldimines was obtained, which with TiCl2(OPr-i)(2) afforded complexes of titanium(IV) dichloride L2TiCl2.
Self-immobilized catalysts for ethylene polymerization based on various phenoxyimine titanium halide complexes
作者:N. I. Ivancheva、D. V. Sanieva、S. P. Fedorov、I. V. Oleinik、I. I. Oleinik、G. A. Tolstikov、S. S. Ivanchev
DOI:10.1007/s11172-012-0116-4
日期:2012.4
The kinetic features of ethylenepolymerization on ten methylalumoxane-activated self-immobilized bis(phenoxyimine) complexes of titanium chloride of various structure containing oxyallyl functional groups were studied. The catalytic activity of the systems was determined in the temperature range 20–60 °C under ethylene pressure 0.4 MPa. The positions and structures of the oxyallyl group and substituents
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Specific features of ethylene polymerization on self-immobilizing catalytic systems based on titanium bis(phenoxy imine) complexes
作者:N. I. Ivancheva、V. K. Badaev、E. V. Sviridova、D. A. Nikolaev、I. V. Oleinik、S. S. Ivanchev
DOI:10.1134/s1070427211010204
日期:2011.1
The kinetics of ethylene polymerization on six methylalumoxane-activated self-immobilizing bis(phenoxy imine) complexes of titanium chloride with allyloxy groups in the m- and p-positions of the N-phenyl ring and with various substituents in the salicylaldehyde fragment was studied. The activity of the complexes in the temperature range 20-60A degrees C and ethylene pressure of 0.4 MPa was evaluated.
Multicentered self-immobilized ethylene polymerization catalysts based on functionalized titanium halide salicylaldiminate complexes for the synthesis of ultra-high-molecular-weight polyethylene
作者:N. I. Ivancheva、S. Ya. Khaikin、E. V. Sviridova、S. P. Fedorov、D. V. Sanieva、O. V. Molev、I. V. Oleinik、S. S. Ivanchev
DOI:10.1134/s1070427212090170
日期:2012.9
Specific features of ethylene polymerization using a new group of catalytic systems based on ten methylalumoxane-activated titanium halide salicylaldiminato complexes functionalized with omega-vinylalkoxy groups and containing tert-butyl substituents in the phenoxide moiety were studied. The catalytic activity of the new group of activated complexes is strongly affected by the position of the omega-vinylalkoxy functional group and by the number and position of substituents in the phenoxide moiety. These factors determine the ratio of the homogeneous and heterogeneous steps of the polymerization as a result of the catalyst self-immobilization onto the polymer formed, and also the molecular characteristics of the polymer obtained at 20, 40, and 60 degrees C and ethylene pressure of 0.4 MPa. The possibility and conditions of preparing ultra-high-molecular-weight polyethylene with improved morphology were revealed.