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Accelerating the Research Approach to Ziegler–Natta Catalysts
Industrial & Engineering Chemistry Research, 2016Despite 60 years of history and a stunning success, Ti-based Ziegler–Natta catalysts for the production of isotactic polypropylene remain black-box systems, and progress still relies on trial and error. This represents a limitation in a moment when the most widely used industrial systems, containing phthalates as selective modifiers, need to be ...
BUSICO, VINCENZO +3 more
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Ziegler–Natta Catalysts: Regioselectivity and “Hydrogen Response”
ACS Catalysis, 2019Advanced High Throughput Experimentation (HTE) methods were applied to quantify the regioselectivity and the so-called “hydrogen response” in propene polymerization of four Ziegler–Natta catalysts ...
Vittoria A. +4 more
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1987
Living anionic lithium-ended polymer is transformed into a soluble Ziegler-Natta Ti (III)/Li-based system. The latter exhibits a high efficiency as at least 80% of C-Ti bonds participate in the homo- and co-polymerization of ethylene and propene, leading to vinylicolefinic type block copolymers.
F. Cansell, A. Siove, M. Fontanille
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Living anionic lithium-ended polymer is transformed into a soluble Ziegler-Natta Ti (III)/Li-based system. The latter exhibits a high efficiency as at least 80% of C-Ti bonds participate in the homo- and co-polymerization of ethylene and propene, leading to vinylicolefinic type block copolymers.
F. Cansell, A. Siove, M. Fontanille
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ChemInform Abstract: Ziegler‐Natta Catalysis
ChemInform, 1997AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Journal of Catalysis, 1964
Abstract A mechanism for the polymerization of olefins is proposed. An essentially octahedrally coordinated ion of a transition element with empty or nearly empty t2g orbitals carrying in its coordination sphere one alkyl group and having one vacant octahedral position is supposed to be the active center.
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Abstract A mechanism for the polymerization of olefins is proposed. An essentially octahedrally coordinated ion of a transition element with empty or nearly empty t2g orbitals carrying in its coordination sphere one alkyl group and having one vacant octahedral position is supposed to be the active center.
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Stereochemical Control in Ziegler-Natta Catalysts
1987The remarkably high level of stereoselectivity associated with magnesium chloride-based catalysts is realized only in the presence of a selectivity control agent (SCA), frequently an aromatic ester.1 The usual effect of the SCA is to reduce activity while significantly enhancing stereoselectivity.2 Fortunately, the reduction in productivity (65%) is ...
S. E. Wilson, W. L. Callender, R. C. Job
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Journal of Macromolecular Science - Pure and Applied Chemistry, 2021
Mohammad Hossein Jandaghian +2 more
exaly
Mohammad Hossein Jandaghian +2 more
exaly