The Number of Active Centers and Propagation Rate Constant in Ethylene Polymerization with a Homogeneous Catalyst Based on Cobalt 2,6-Bis[imino]pyridyl Complex with Methylaluminoxane Activator Full article
| Journal |
Polymer Science Series B
ISSN: 1560-0904 , E-ISSN: 1531-8583 |
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| Output data | Year: 2008, Volume: 50, Number: 11-12, Pages: 326-329 Pages count : 4 DOI: 10.1134/S1560090408110067 | ||
| Tags | Active Center; Polymer Science Series; Pyridyl; Imino; Homogeneous Catalyst | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 07-03-00311 |
Abstract:
The number of active centers Cp and propagation rate constant kp upon ethylene polymerization
with a homogeneous catalyst based on a cobalt complex with bis[imino]pyridyl ligands (LCoCl2, where L is
2,6-(2,6-(Me)2C6H3N=CMe)2C5H3N) using methylaluminoxane as an activator was determined by quenching
by radioactive carbon monoxide (14CO). It was found that the drop in activity during polymerization on the
above catalyst is due to the decreasing number of active centers (from 0.23 to 0.14 mol/mol Co within 15 min
of polymerization); the propagation rate constant remained unchanged, 3.5 × 103 l/(mol s) at 35°C, which is
substantially lower than for a catalyst based on an iron complex with analogous bis[imino]pyridyl ligands. It
follows from the data on molecular mass characteristics of the produced polymer that the homogeneous catalyst
LCoCl2/methylaluminoxane is of monocenter type, and the obtained value of the propagation rate constant
reflects the true reactivity of its active centers
Cite:
Barabanov A.A.
, Semikolenova N.V.
, Bukatov G.D.
, Mats’ko M.A.
, Zakharov V.A.
The Number of Active Centers and Propagation Rate Constant in Ethylene Polymerization with a Homogeneous Catalyst Based on Cobalt 2,6-Bis[imino]pyridyl Complex with Methylaluminoxane Activator
Polymer Science Series B. 2008. V.50. N11-12. P.326-329. DOI: 10.1134/S1560090408110067 WOS Scopus РИНЦ OpenAlex
The Number of Active Centers and Propagation Rate Constant in Ethylene Polymerization with a Homogeneous Catalyst Based on Cobalt 2,6-Bis[imino]pyridyl Complex with Methylaluminoxane Activator
Polymer Science Series B. 2008. V.50. N11-12. P.326-329. DOI: 10.1134/S1560090408110067 WOS Scopus РИНЦ OpenAlex
Original:
Барабанов А.А.
, Семиколенова Н.В.
, Букатов Г.Д.
, Мацько М.А.
, Захаров В.А.
Число активных центров и константа скорости роста при полимеризации этилена на гомогенном катализаторе на основе 2,6-бис(имино)пиридинового комплекса кобальта с активатором метилалюмоксаном
Высокомолекулярные соединения. Серия Б. 2008. Т.50. №11. С.2048-2052. РИНЦ ANCAN
Число активных центров и константа скорости роста при полимеризации этилена на гомогенном катализаторе на основе 2,6-бис(имино)пиридинового комплекса кобальта с активатором метилалюмоксаном
Высокомолекулярные соединения. Серия Б. 2008. Т.50. №11. С.2048-2052. РИНЦ ANCAN
Dates:
| Submitted: | Feb 10, 2008 |
| Published print: | Dec 1, 2008 |
| Published online: | Dec 23, 2008 |
Identifiers:
| Web of science: | WOS:000261959100006 |
| Scopus: | 2-s2.0-59849112362 |
| Elibrary: | 13584666 |
| OpenAlex: | W2059860272 |