@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‐, 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",
}