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

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

Journal

Journal of Applied Polymer Science
ISSN: 0021-8995 , E-ISSN: 1097-4628

Output data

Year: 2021, Volume: 138, Number: 20, Article number : 50436, Pages count : DOI: 10.1002/app.50436

Tags

catalysts; mechanical properties; polyolefins; structure‐ property relationships; thermal properties

Authors

Matsko Mikhail A. ¹ , Semikolenova Nina ¹ , Zakharov Vladimir A. ^1,2 , Soshnikov Igor E. ^1,2 , Shundrina Inna K. ³ , Sun Wen-Hua ^4,5,6

Affiliations

1	(Данные Web of science) SB RAS, Boreskov Inst Catalysis, Lavrentieva 5, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Novosibirsk, Russia
3	(Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem SB RAS, Novosibirsk, Russia
4	(Данные Web of science) Chinese Acad Sci, Key Lab Engn Plast, Inst Chem, Beijing, Peoples R China
5	(Данные Web of science) Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing, Peoples R China
6	(Данные Web of science) Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing, Peoples R China

Comparative data on the micro-structures and properties of branched polyethylenes (BPE) produced via ethylene homopolymerization over homogeneous N,N-alpha-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.

Matsko M.A. , Semikolenova N. , Zakharov V.A. , Soshnikov I.E. , Shundrina I.K. , Sun W-H.
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. V.138. N20. 50436 . DOI: 10.1002/app.50436 WOS Scopus РИНЦ

Published online:	Jan 6, 2021
Published print:	May 20, 2021

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