Abstract: The molecular structure of polyethylene (PE) produced with supported titanium-magnesium (TMC) and vanadium-magnesium (VMC) catalysts has been studied by means of IR and 13C NMR spectroscopic methods. It has been shown that PE produced with VMC in the presence of hydrogen differs by a lower content of double bonds and higher branching compared with PE obtained with TMC. Furthermore, branching is observed both in the heptane-soluble low molecular weight fraction and in the high molecular weight fraction of PE. 13C NMR studies of the low molecular weight fraction of PE showed the presence of methyl branches. Intramolecular isomerization of the growing polymer chains involving hydrogen seems to be a possible reason for the formation of methyl branches.

Cite: Echevskaya L.G. , Zakharov V.A. , Golovin A.V. , Mikenas T.B.
Molecular Structure of Polyethylene Produced with Supported Vanadium-Magnesium Catalyst
Macromolecular Chemistry and Physics. 1999. V.200. N6. P.1434-1438. DOI: 10.1002/(SICI)1521-3935(19990601)200:6<1434::AID-MACP1434>3.0.CO;2-4 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Jun 26, 1998
Accepted:	Oct 19, 1998
Published online:	May 19, 1999
Published print:	Jun 1, 1999

Identifiers:

Web of science:	WOS:000080688600023
Scopus:	2-s2.0-0001761956
Elibrary:	13323753
Chemical Abstracts:	1999:392329
Chemical Abstracts (print):	131:88381
OpenAlex:	W2092265758

Citing:

DB	Citing
Web of science	38
Scopus	42
Elibrary	39
OpenAlex	35

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