Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene
Luigi Resconi
1
,
Fabrizio Piemontesi
1
,
Isabella Camurati
1
,
Olof Sudmeijer
1
,
Pavel V Ivchenko
1
,
Publication type: Journal Article
Publication date: 1998-03-01
scimago Q1
wos Q1
SJR: 5.554
CiteScore: 22.5
Impact factor: 15.6
ISSN: 00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
A new class of isospecific and highly regiospecific C2-symmetric ansa-zirconocenes, characterized by a bisindenyl ansa ligand with bulky substituents in the 3 position of indene and a single carbon bridge is disclosed: variation of the size of the substituent in C(3) has a strong effect on the extent of chain transfer and isospecificity in propene polymerization. In fact, while rac-[Me2C(1-indenyl)2]ZrCl2 produces low molecular weight and moderately isotactic polypropene (iPP) also containing some regioirregularities (Mn = 6500, mmmm ca. 81% and 2,1tot = 0.4% at 50 °C in liquid monomer), rac-[Me2C(3-tert-butyl-1-indenyl)2]ZrCl2 produces iPP with molecular weights between 25 000 (Tp = 70 °C) and 410 000 (Tp = 20 °C) and a fairly high isotacticity (mmmm ca. 95% at 50 °C), with no detectable 2,1 units. The influence of polymerization temperature on the catalyst performance has been investigated by polymerizing liquid propene in the temperature range of 20−70 °C: the experimental ΔΔE⧧ values for enantiofac...
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171
Total citations:
171
Citations from 2024:
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GOST
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Resconi L. et al. Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene // Journal of the American Chemical Society. 1998. Vol. 120. No. 10. pp. 2308-2321.
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Resconi L., Piemontesi F., Camurati I., Sudmeijer O., Nifant'ev I. E., Ivchenko P. V., Kuz'mina L. G. Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene // Journal of the American Chemical Society. 1998. Vol. 120. No. 10. pp. 2308-2321.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1021/ja973160s
UR - https://pubs.acs.org/doi/10.1021/ja973160s
TI - Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene
T2 - Journal of the American Chemical Society
AU - Resconi, Luigi
AU - Piemontesi, Fabrizio
AU - Camurati, Isabella
AU - Sudmeijer, Olof
AU - Nifant'ev, Ilya E.
AU - Ivchenko, Pavel V
AU - Kuz'mina, Lyudmila G.
PY - 1998
DA - 1998/03/01
PB - American Chemical Society (ACS)
SP - 2308-2321
IS - 10
VL - 120
SN - 0002-7863
SN - 1520-5126
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{1998_Resconi,
author = {Luigi Resconi and Fabrizio Piemontesi and Isabella Camurati and Olof Sudmeijer and Ilya E. Nifant'ev and Pavel V Ivchenko and Lyudmila G. Kuz'mina},
title = {Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene},
journal = {Journal of the American Chemical Society},
year = {1998},
volume = {120},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://pubs.acs.org/doi/10.1021/ja973160s},
number = {10},
pages = {2308--2321},
doi = {10.1021/ja973160s}
}
Cite this
MLA
Copy
Resconi, Luigi, et al. “Highly regiospecific zirconocene catalysts for the isospecific polymerization of propene.” Journal of the American Chemical Society, vol. 120, no. 10, Mar. 1998, pp. 2308-2321. https://pubs.acs.org/doi/10.1021/ja973160s.