Formation of branched polyethylenes by ethylene homopolymerization using LNiBr2 homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE

Mikhail A. Matsko; Nina V. Semikolenova; Vladimir A. Zakharov; Igor E. Soshnikov; Inna K. Shundrina; Wen Hua Sun

doi:10.1002/app.50436

Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE

Mikhail A. Matsko, Nina V. Semikolenova, Vladimir A. Zakharov, Igor E. Soshnikov, Inna K. Shundrina, Wen Hua Sun

Research output: Contribution to journal › Article › peer-review

Abstract

Comparative data on the micro-structures and properties of branched polyethylenes (BPE) produced via ethylene homopolymerization over homogeneous N,N-α-diimine LNiBr₂ complexes with different ligand composition (AlEt₂Cl as a cocatalyst) and corresponding supported catalysts LNiBr₂/SiO₂(Al) (Al[iso-Bu]₃ as a cocatalyst) are presented. Noticeable differences were observed between micro-structures of BPEs obtained using homo- and heterogeneous LNiBr₂ complexes as catalysts. Supported catalysts produce BPEs with the majority of methyl branches (17–18 CH₃(1000 C)⁻¹ characterized by different molecular masses (1800–210 kg mol⁻¹) and molecular weight distributions (M_w[M_n]⁻¹ = 5.9 and 2.6). Thermal and mechanical properties of these BPE samples obtained over supported Ni catalysts are similar to those of commercial LLDPE samples prepared with metallocene and Ziegler-Natta catalysts.

Original language	English
Article number	50436
Number of pages	13
Journal	Journal of Applied Polymer Science
Volume	138
Issue number	20
Early online date	6 Jan 2021
DOIs	https://doi.org/10.1002/app.50436
Publication status	Published - 20 May 2021

Keywords

catalysts
mechanical properties
polyolefins
structure-property relationships
thermal properties
structure&#8208
ALPHA-OLEFINS
MOLECULAR-WEIGHT
COMPLEXES
property relationships
COMONOMER
DICHLORIDES
ZIEGLER-NATTA CATALYSTS
METALLOCENE
COPOLYMERIZATION

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10.1002/app.50436

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Matsko, M. A., Semikolenova, N. V., Zakharov, V. A., Soshnikov, I. E., Shundrina, I. K., & Sun, W. H. (2021). Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE. Journal of Applied Polymer Science, 138(20), [50436]. https://doi.org/10.1002/app.50436

@article{a430afc260fc48b1aa60650377fc8aa5,

title = "Formation of branched polyethylenes by ethylene homopolymerization using LNiBr2 homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE",

abstract = "Comparative data on the micro-structures and properties of branched polyethylenes (BPE) produced via ethylene homopolymerization over homogeneous N,N-α-diimine LNiBr2 complexes with different ligand composition (AlEt2Cl as a cocatalyst) and corresponding supported catalysts LNiBr2/SiO2(Al) (Al[iso-Bu]3 as a cocatalyst) are presented. Noticeable differences were observed between micro-structures of BPEs obtained using homo- and heterogeneous LNiBr2 complexes as catalysts. Supported catalysts produce BPEs with the majority of methyl branches (17–18 CH3(1000 C)−1 characterized by different molecular masses (1800–210 kg mol−1) and molecular weight distributions (Mw[Mn]−1 = 5.9 and 2.6). Thermal and mechanical properties of these BPE samples obtained over supported Ni catalysts are similar to those of commercial LLDPE samples prepared with metallocene and Ziegler-Natta catalysts.",

keywords = "catalysts, mechanical properties, polyolefins, structure-property relationships, thermal properties, structure&#8208, ALPHA-OLEFINS, MOLECULAR-WEIGHT, COMPLEXES, property relationships, COMONOMER, DICHLORIDES, ZIEGLER-NATTA CATALYSTS, METALLOCENE, COPOLYMERIZATION",

author = "Matsko, {Mikhail A.} and Semikolenova, {Nina V.} and Zakharov, {Vladimir A.} and Soshnikov, {Igor E.} and Shundrina, {Inna K.} and Sun, {Wen Hua}",

note = "Funding Information: Technical assistance from Mrs. T.G. Ryzhkova is gratefully acknowledged. The studies were performed using the equipment of the Center of Collective Use ''National Center of Catalyst Research'' and of the Multi‐Access Chemical Research Center SB RAS. This work was supported by Ministry of Science and Higher Education of the Russian Federation. The authors acknowledge partial financial support by the Russian Foundation for Basic Research and the National Natural Science Foundation of China (#18–53‐80,031/51861145303). Publisher Copyright: {\textcopyright} 2021 Wiley Periodicals LLC Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = may,

day = "20",

doi = "10.1002/app.50436",

language = "English",

volume = "138",

journal = "Journal of Applied Polymer Science",

issn = "0021-8995",

publisher = "John Wiley and Sons Inc.",

number = "20",

}

Matsko, MA, Semikolenova, NV, Zakharov, VA, Soshnikov, IE, Shundrina, IK & Sun, WH 2021, 'Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE', Journal of Applied Polymer Science, vol. 138, no. 20, 50436. https://doi.org/10.1002/app.50436

Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts : Interpretation of the polymer structures in comparison with commercial LLDPE. / Matsko, Mikhail A.; Semikolenova, Nina V.; Zakharov, Vladimir A. et al.

In: Journal of Applied Polymer Science, Vol. 138, No. 20, 50436, 20.05.2021.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Formation of branched polyethylenes by ethylene homopolymerization using LNiBr2 homo- and heterogeneous precatalysts

T2 - Interpretation of the polymer structures in comparison with commercial LLDPE

AU - Matsko, Mikhail A.

AU - Semikolenova, Nina V.

AU - Zakharov, Vladimir A.

AU - Soshnikov, Igor E.

AU - Shundrina, Inna K.

AU - Sun, Wen Hua

N1 - Funding Information: Technical assistance from Mrs. T.G. Ryzhkova is gratefully acknowledged. The studies were performed using the equipment of the Center of Collective Use ''National Center of Catalyst Research'' and of the Multi‐Access Chemical Research Center SB RAS. This work was supported by Ministry of Science and Higher Education of the Russian Federation. The authors acknowledge partial financial support by the Russian Foundation for Basic Research and the National Natural Science Foundation of China (#18–53‐80,031/51861145303). Publisher Copyright: © 2021 Wiley Periodicals LLC Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5/20

Y1 - 2021/5/20

N2 - Comparative data on the micro-structures and properties of branched polyethylenes (BPE) produced via ethylene homopolymerization over homogeneous N,N-α-diimine LNiBr2 complexes with different ligand composition (AlEt2Cl as a cocatalyst) and corresponding supported catalysts LNiBr2/SiO2(Al) (Al[iso-Bu]3 as a cocatalyst) are presented. Noticeable differences were observed between micro-structures of BPEs obtained using homo- and heterogeneous LNiBr2 complexes as catalysts. Supported catalysts produce BPEs with the majority of methyl branches (17–18 CH3(1000 C)−1 characterized by different molecular masses (1800–210 kg mol−1) and molecular weight distributions (Mw[Mn]−1 = 5.9 and 2.6). Thermal and mechanical properties of these BPE samples obtained over supported Ni catalysts are similar to those of commercial LLDPE samples prepared with metallocene and Ziegler-Natta catalysts.

AB - Comparative data on the micro-structures and properties of branched polyethylenes (BPE) produced via ethylene homopolymerization over homogeneous N,N-α-diimine LNiBr2 complexes with different ligand composition (AlEt2Cl as a cocatalyst) and corresponding supported catalysts LNiBr2/SiO2(Al) (Al[iso-Bu]3 as a cocatalyst) are presented. Noticeable differences were observed between micro-structures of BPEs obtained using homo- and heterogeneous LNiBr2 complexes as catalysts. Supported catalysts produce BPEs with the majority of methyl branches (17–18 CH3(1000 C)−1 characterized by different molecular masses (1800–210 kg mol−1) and molecular weight distributions (Mw[Mn]−1 = 5.9 and 2.6). Thermal and mechanical properties of these BPE samples obtained over supported Ni catalysts are similar to those of commercial LLDPE samples prepared with metallocene and Ziegler-Natta catalysts.

KW - catalysts

KW - mechanical properties

KW - polyolefins

KW - structure-property relationships

KW - thermal properties

KW - structure&#8208

KW - ALPHA-OLEFINS

KW - MOLECULAR-WEIGHT

KW - COMPLEXES

KW - property relationships

KW - COMONOMER

KW - DICHLORIDES

KW - ZIEGLER-NATTA CATALYSTS

KW - METALLOCENE

KW - COPOLYMERIZATION

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U2 - 10.1002/app.50436

DO - 10.1002/app.50436

M3 - Article

AN - SCOPUS:85099061269

VL - 138

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

IS - 20

M1 - 50436

ER -

Matsko MA, Semikolenova NV, Zakharov VA, Soshnikov IE, Shundrina IK, Sun WH. Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE. Journal of Applied Polymer Science. 2021 May 20;138(20). 50436. https://doi.org/10.1002/app.50436

Formation of branched polyethylenes by ethylene homopolymerization using LNiBr₂ homo- and heterogeneous precatalysts: Interpretation of the polymer structures in comparison with commercial LLDPE

Abstract

Keywords

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