Copolymerization of Ethylene with α-Olefins over Highly Active Supported Ziegler-Natta Catalyst with Vanadium Active Component Full article
| Journal |
Polyolefins Journal
ISSN: 2322-2212 , E-ISSN: 2345-6868 |
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| Output data | Year: 2019, Volume: 6, Number: 2, Pages: 117-126 Pages count : 10 DOI: 10.22063/poj.2018.2326.1126 | ||||||
| Tags | Polyethylene (PE); supported vanadium-magnesium catalyst; molecular weight distribution; effect of comonomer; reactivity ratio | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
| 2 | PetroChina Petrochemical Research Institute |
Abstract:
A 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 profile, copolymer yield, molecular weight and molecular weight distribution of copolymers have been obtained. It was found that both α-olefins are effective chain transfer agents in the ethylene-α-olefins copolymerization. The copolymerization ability of VMC is much higher than that of the well-known titanium-magnesium catalysts. It was found that the use of optimal conditions of ethylene/α-olefin polymerization on the VMC catalyst makes it possible to obtain copolymers with a high yield (10-16 kg gcat-1 cat for 2 h) and broad and bimodal MWD. Data on the branchings distribution in copolymers prepared with VMC catalyst have been obtained via fractionation of copolymers on the fractions with narrow polydispersity (Mw/Mn ≈ 2). Quite a uniform distribution of branchings over fractions with different molecular weights was found in distinction to inhomogeneous distribution of branchings in copolymers produced over the well-known supported titanium-magnesium catalyst
Cite:
Zhao Z.
, Mikenas T.B.
, Zakharov V.A.
, Nikolaeva M.I.
, Matsko M.A.
, Bessudnova E.V.
, Wu W.
Copolymerization of Ethylene with α-Olefins over Highly Active Supported Ziegler-Natta Catalyst with Vanadium Active Component
Polyolefins Journal. 2019. V.6. N2. P.117-126. DOI: 10.22063/poj.2018.2326.1126 Scopus РИНЦ AN OpenAlex
Copolymerization of Ethylene with α-Olefins over Highly Active Supported Ziegler-Natta Catalyst with Vanadium Active Component
Polyolefins Journal. 2019. V.6. N2. P.117-126. DOI: 10.22063/poj.2018.2326.1126 Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 11, 2018 |
| Accepted: | Dec 17, 2018 |
| Published online: | Dec 18, 2018 |
| Published print: | Jun 1, 2019 |
Identifiers:
| Scopus: | 2-s2.0-85069937843 |
| Elibrary: | 41629932 |
| Chemical Abstracts: | 2020:399796 |
| OpenAlex: | W2918327238 |