Abstract: The copolymerization of ethylene with higher a-olefins initiated by new modifications of highly active supported titanium-magnesium and vanadium-magnesium catalysts was studied. It was established that the reactivities of linear a-olefins in the copolymerization with ethylene decrease in the sequence propylene > 1 -butene > 1-hexene > 1-octene. The reactivities of branched a-olefins are determined by the position of a sub¬stituent with respect to the double bond and the length of chain branching and decrease in the sequence 4-methyl- 1-pentene > 3-methvl-1-butene > 3-methyl-1-pentene. The data on high relative reactivity of 2-nor- bornene in copolymerization with ethy lene, which is close to that of linear a-olefin (1-hexene), were obtained. For all the comonomers studied, the vanadium-magnesium catalyst shows higher activity in copolymerization than the titanium-magnesium catalyst. It was shown that, in the range 40-70°C, the temperature of polymer¬ization affects the reactivity ratio of ethylene r{. In the copolymerization of ethylene with a-olefins, the initial acceleration period sharply decreases, and the maximum activity is observed on the kinetic curves.

Cite: Zakharov V.A. , Echevskaya L.G.
Kinetics of the Copolymerization of Ethylene with α-Olefins Initiated by Supported Titanium-Magnesium and Vanadium-Magnesium Catalysts
Polymer Science Series B. 1997. V.39. N7-8. P.291-294. Scopus РИНЦ

Original: Захаров В.А. , Ечевская Л.Г.
Кинетические особенности сополимеризации этилена с альфа-олефинами на нанесенных титан-магниевых и ванадий-магниевых катализаторах
Высокомолекулярные соединения. 1997. Т.39. №8. С.1396-1399. WOS Scopus РИНЦ ANCAN

Dates:

Submitted:	Jul 12, 1996
Accepted:	Feb 12, 1997
Published print:	Jul 1, 1997

Identifiers:

Scopus:	2-s2.0-0009709553
Elibrary:	13268779

Citing:

DB	Citing
Scopus	9
Elibrary	8