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
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
In Press,
Source type:
Original
|
| Journal |
Journal of Applied Polymer Science
ISSN: 0021-8995
, E-ISSN: 1097-4628
|
| Output data |
Year: 2021,
Article number
: 50436,
Pages count
: 13
DOI:
10.1002/app.50436
|
| Tags |
catalysts, mechanical properties, polyolefins, structure-property relationships, thermal properties |
| Authors |
Matsko Mikhail A.
1
,
Semikolenova Nina V.
1
,
Zakharov Vladimir A.
1,2
,
Soshnikov Igor E.
1,2
,
Shundrina Inna K.
3
,
Sun Wen‐Hua
4,5
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, SB RAS, Novosibirsk, Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, Russia
|
| 3 |
N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Novosibirsk, Russia
|
| 4 |
Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
|
| 5 |
CAS Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing, China
|
|
Funding (2)
|
1
|
Russian Foundation for Basic Research
|
18-53-80031
|
|
2
|
Ministry of Science and Higher Education of the Russian Federation
|
ГЗ-2017-2020
|
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.