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Titanium and Vanadium Catalysts with 2-Hydroxyphenyloxazoline and Oxazine Ligands for Ethylene-Norbornene (co)Polymerization
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SYSNO ASEP 0521078 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Titanium and Vanadium Catalysts with 2-Hydroxyphenyloxazoline and Oxazine Ligands for Ethylene-Norbornene (co)Polymerization Author(s) Ochedzan-Siodlak, W. (PL)
Siodlak, D. (PL)
Piontek, A. (PL)
Doležal, Karel (UEB-Q) RID, ORCIDArticle number 1041 Source Title Catalysts. - : MDPI
Roč. 9, č. 12 (2019)Number of pages 11 s. Language eng - English Country CH - Switzerland Keywords polyethylene ; norbornene copolymers ; oxazole ligand Subject RIV CC - Organic Chemistry OECD category Organic chemistry Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000507336600070 EID SCOPUS 85078118202 DOI 10.3390/catal9121041 Annotation A series of titanium and vanadium complexes with oxazoline 2-(4,5-dihydro-1,3-oxazol-2-yl)phenol (L1), 2-(4-methyl-4,5-dihydro-1,3-oxazol-2-yl)phenol (L2), and oxazine 2-(5,6-dihydro-4H-1,3-oxazin-2-yl)phenol (L3) ligands were synthesized, and their structures were determined by NMR and MS methods as (L)(2)MtCl(2). The vanadium complexes were found to be highly active in ethylene (7300 kgPE/(molV.h)) and ethylene/norbornene (5300 kgCop/(molV.h)) (co)polymerization. The polyethylene characteristics were melting temperature (123-142 degrees C), crystallinity degree (49-75%), molecular weight (5.7-8.5 x 10(5) g/mol), molecular weight distribution (1.5-2.4). The ethylene-norbornene (E-NB) copolymer characteristics were molecular weight (2.6-0.9 x 10(5) g/mol), molecular weight distribution (1.6-2.2), glass transition temperature (4-62 degrees C), norbornene incorporation (12.3-30.1 mol%) at initial concentration (0.5-1.5 mol/L). The microstructure of E-NB copolymers depends on the catalyst applied with the highest diads content for the (L3)(2)VCl2 and triads for the (L2)(2)VCl2 complexes. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2020 Electronic address http://dx.doi.org/10.3390/catal9121041
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