With the collaboration of Iran Polymer Society
Catalysis
The influence of magnesium dichloride as support on molecular weights of the polyethylenes produced by Ziegler-Natta catalyst

Tatiana B. Mikenas; A. V. Sholma; Vladimir A. Zakharov; Mikhail Matsko

Volume 11, Issue 4 , December 2024, , Pages 235-242

https://doi.org/10.22063/poj.2024.35573.1333

Abstract
  The paper presents data on the effect exerted by magnesium dichloride in Ziegler-Natta catalysts on the activity and molecular weight of polyethylene (PE) produced by ethylene polymerization in the absence or presence of hydrogen. It was found that ethylene polymerization in the absence of hydrogen over ...  Read More

Catalysis
Regulation of molecular weight, molecular weight distribution and branching distribution in polyethylene, produced by supported catalysts bearing bis(imino)pyridyl Fe(II) and N,N-α-diimine Ni(II) complexes

Nina V. Semikolenova; Valentina N. Panchenko; Mikhail A. Matsko; Vladimir A. Zakharov

Volume 9, Issue 2 , July 2022, , Pages 103-116

https://doi.org/10.22063/poj.2022.3072.1208

Abstract
  For preparation of highly active supported catalyst with bis(imino)pyridyl Fe(II) complexes (Fe1, Fe2) and N,N-α-diimine complex of Ni (Ni3), silica modified with alumina (SiO2 (Al)) was used as a support. Data on the possibility to regulate molecular weight (MW) and molecular weight distribution ...  Read More

Catalysis
Copolymerization of ethylene with α-olefins over highly active supported Ziegler-Natta catalyst with vanadium active component

Zenghui Zhao; Tatiana Mikenas; Vladimir Aleksandrovich Zakharov; Marina Nikolaeva; Mikhail Matsko; Elena Bessudnova; Wei Wu

Volume 6, Issue 2 , June 2019, , Pages 117-126

https://doi.org/10.22063/poj.2018.2326.1126

Abstract
  The new highly active supported vanadium-magnesium catalyst (VMC) has been studied in α-olefin (1-butene, 1-hexene)/ ethylene copolymerization in the presence of hydrogen. Data on the effect of α-olefin/ethylene ratio in copolymerization on the content of branchings in copolymers, kinetic ...  Read More

Catalysis
Ziegler-Natta catalysts for propylene polymerization – Interaction of an external donor with the catalyst

Valentina Nikolaevna Panchenko; Ludmila Viktorovna Vorontsova; Vladimir Aleksandrovich Zakharov

Volume 4, Issue 1 , January 2017, , Pages 87-97

https://doi.org/10.22063/poj.2016.1385

Abstract
  The interaction of the external donor (propyltrimethoxysilane - PTMS) with titanium-magnesium catalysts (TMCs) containing dibutylphthalate (DBP) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared diffuse reflectance spectroscopy (DRIFTS). The chemical ...  Read More

Catalysis
Effect of the synthesis conditions of titanium-magnesium catalysts on the composition, structure and performance in propylene polymerization

Natalya N. Chumachenko; Vladimir A. Zakharov; Sergey A. Sergeev; Svetlana V. Cherepanova

Volume 4, Issue 1 , January 2017, , Pages 111-122

https://doi.org/10.22063/poj.2016.1399

Abstract
  Supported catalysts synthesized via the interaction of Mg(OEt)2 with TiCl4 in the presence or absence of an internal stereoregulating donor (di-n-butyl phthalate), with different solvents (chlorobenzene, n-undecane, n-heptane) at different titanation temperatures have been studied by a set of physicochemical ...  Read More

Catalysis
Kinetics of ethylene polymerization over titanium-magnesium catalysts: The reasons for the observed second order of polymerization rate with respect to ethylene

Mikhail A. Matsko; Vladimir A. Zakharov; Marina I. Nikolaeva; Tatiana B. Mikenas

Volume 2, Issue 1 , January 2015, , Pages 27-38

https://doi.org/10.22063/poj.2015.1112

Abstract
  The data on the effect of ethylene concentration on polymerization rate for several modifications of modern highly active titanium–magnesium catalysts TiCl4/MgCl2 are presented. These catalysts differ in titanium content and conditions of support preparation, activities, and the shape of kinetic ...  Read More