Kinetic Features of Ethylene Polymerization over Titanium–Magnesium Catalysts with Different Structures and Morphology Full article
| Journal |
Iranian Polymer Journal
ISSN: 1026-1265 , E-ISSN: 1735-5265 |
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| Output data | Year: 2022, Volume: 31, Pages: 471–484 Pages count : 14 DOI: 10.1007/s13726-021-01004-w | ||
| Tags | Kinetics; Morphology; Molecular weight; Characterization; Polyethylene; Supported Ziegler–Natta catalysts | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0004 |
Abstract:
Establishing a relationship between structural characteristics of a catalyst system and morphology of polymer particles, on the one hand, and the kinetic characteristics of the catalysts in relation to the molecular weight of the resulting polymer on the other hand, is an important scientific task and has considerable applications. In this paper, for the first time, data on the formation of polyethylene particles with different molecular weights and different morphologies on two samples of highly active supported titanium–magnesium catalysts (TMC) having different textural characteristics (pore structure and crystallite size) are obtained. It is shown that this effect persists with varying polymerization conditions (polymerization temperature, the presence and absence of hydrogen as a polymer chain transfer agent) and titanium content in the catalyst. The discussion of possible causes of the revealed differences in molecular weight of the produced polymers is based on the kinetic data and morphological analysis of the polymer particles formed on TMCs with different structural characteristics and titanium contents. The formation of PE with different molecular weights over these catalysts may be related to different concentrations of ethylene in the subsurface layer of polymer near active sites of the catalysts.
Cite:
Mikenas T.B.
, Zakharov V.A.
, Matsko M.A.
Kinetic Features of Ethylene Polymerization over Titanium–Magnesium Catalysts with Different Structures and Morphology
Iranian Polymer Journal. 2022. V.31. P.471–484. DOI: 10.1007/s13726-021-01004-w WOS Scopus РИНЦ AN OpenAlex
Kinetic Features of Ethylene Polymerization over Titanium–Magnesium Catalysts with Different Structures and Morphology
Iranian Polymer Journal. 2022. V.31. P.471–484. DOI: 10.1007/s13726-021-01004-w WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jul 20, 2021 |
| Accepted: | Oct 30, 2021 |
| Published online: | Jan 7, 2022 |
| Published print: | Apr 1, 2022 |
Identifiers:
| Web of science: | WOS:000739817800001 |
| Scopus: | 2-s2.0-85122371258 |
| Elibrary: | 47921975 |
| Chemical Abstracts: | 2022:712719 |
| OpenAlex: | W4205810471 |