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Redox‐Controlled Olefin (Co)Polymerization Catalyzed by ...

Nov 02, 2015· This work provides a new strategy to control the olefin polymerization process. Citing Literature. Supporting Information Volume 54, Issue 51. December 14, 2015. Pages 15520-15524. Related; Information; Close Figure Viewer. Return to Figure ...

Catalyst Components and Catalysts for Olefin ...

KR-0144683-B1 chemical patent summary.

Alkene - Wikipedia

In chemistry, an alkene is a hydrocarbon that contains a carbon–carbon double bond.. Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds. Two general types of monoalkenes are distinguished: terminal and internal. Also called α-olefins, terminal alkenes are more useful.. However, the IUPAC recommends using the name "alkene" …

Degradable polymers via olefin metathesis polymerization ...

Sep 01, 2021· The most significant advantage of olefin metathesis polymerization over other polymerization approaches is the facile functionalization and diversification of the polymeric backbone. The mild reaction conditions and excellent functional group tolerance enable direct graft-through polymerization of monomers bearing various functional groups (e.g ...

Solid catalyst component and catalyst for olefin ...

May 10, 2001· : A solid catalyst component for olefin polymerization obtained by contacting a titanium compound having a titanium-halogen bond and an ester compound simultaneously, or a mixture of a titanium compound (A) having a titanium-halogen bond and an ester compound (B), with a solid catalyst component precursor (C) containing a magnesium …

(PDF) EFFECTS OF COMPONENTS ADDITION ORDER IN OLEFIN ...

The order of the components addition in olefin polymerization by metallocene/MAO systems has the great effects on polymer yield, molecular mass and molecular mass distribution. The theoretical consideration based on the charge percolation mechanism

Probing the interactions between all components of the ...

7, 34 Of course, the olefin polymerization behavior of Cp 2 ZrCl 2 and to a lesser extent Cp 2 ZrMe 2 upon activation with MAO has been extensively studied, and both precursors require a …

Heteroatom-assisted olefin polymerization by rare-earth ...

a-olefin monomer and a rare-earth metal catalyst can significantly raise the olefin polymerization activity and thereby promote itscopolymerization with ethylene. Byusin g this heteroatom-assisted olefin polymerization (HOP) strategy, we have successfully synthesized a series of heteroatom (O, S, Se, N, and P) –functionalized polyolefins

Structure and dynamics of catalytically competent but ...

Sep 24, 2020· Structure and dynamics of catalytically competent but labile paramagnetic metal-hydrides: the Ti(III)-H in homogeneous olefin polymerization E. Salvadori, M. Chiesa, A. Buonerba and A. Grassi, Chem. Sci., 2020, 11, 12436 DOI: 10.1039/D0SC04967K This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

CATALYST SYSTEMS, OLEFIN POLYMERIZATION CATALYST ...

An olefin polymerization catalyst component comprising an internal electron donor compound shown in formula (I) below is provided in this disclosure: wherein X is O, S, NR a, PR b, or POOR c, R a is independently hydrogen, halogen, carbonyl hydrocarbon, linear or branched unsaturated or saturated alkyl hydrocarbon, cyclic, aromatic, or ...

Elucidating Secondary Metal Cation Effects on Nickel ...

Keywords: olefin polymerization, coordination insertion, nickel catalysts, cation tuning, polyethylene ABSTRACT: Secondary metal cations, such as alkali and transition metal ions, have been shown to enhance the catalytic perfor-mance of nickel and palladium olefin polymerization catalysts. Their beneficial effects can manifest in different ways ...

olefin | Description, Characteristics, & Types | Britannica

Beginning in the 1970s, so-called linear alpha olefins (LAOs; distinguished by the double bond occurring on the first, or alpha, carbon atom in the unbranched chain) were produced through polymerization (specifically, oligomerization) and olefin metathesis, which together formed the basis of the Shell higher olefin process (SHOP). In olefin oligomerization, the compounds are …

Stabilized Vanadium Catalyst for Olefin Polymerization by ...

with prior heterogeneous vanadium catalysts for olefin polymerization,[6,7] which could greatly inform mechanistic analysis and catalyst optimization. To evaluate ethylene polymerization, both 1 and 2 were treated with ethylene under slurry phase conditions with modified methylaluminoxane-12 (MMAO-12) as acocatalyst (Table 3).

Fundamental aspects of heterogeneous Ziegler–Natta olefin ...

Fundamental aspects of heterogeneous Ziegler–Natta olefin polymerization catalysis: an experimental and computational overview J. Kumawat and V. K. Gupta, Polym. Chem., 2020, 11, 6107 DOI: 10.1039/D0PY00753F . To request permission to reproduce ...

Highly Electrophilic Olefin Polymerization Catalysts ...

Weakly Coordinating Al-, Nb-, Ta-, Y-, and La-Based Perfluoroaryloxymetalate Anions as Cocatalyst Components for Single-Site Olefin Polymerization. Organometallics 2002, 21 (18), …

Light-mediated olefin coordination polymerization and ...

A significant number of molecular olefin polymerization catalysts based on transition metals are capable of harnessing polymerization behavior thanks to their finely-tunable ligand sets, where ligand variation acts as electronic and/or steric factors towards the active metal center. Light has been utilized as a green and specific stimulus in ...

Polymerization With Metallocene Catalysts Patents and ...

Apr 26, 1995· Abstract: Ethylene copolymer compositions comprise: an ethylene/.alpha.-olefin copolymer component comprising at least one ethylene/.alpha.-olefin copolymer having a density within a specific range, a melt flow rate (MFR) within a specific range, an amount of an n-decane-soluble portion within a specific range and a melt tension (MT) that satisfies a specific relation …

Polyolefin - Wikipedia

An alpha-olefin (or α-olefin) is an alkene where the carbon-carbon double bond starts at the α-carbon atom, i.e. the double bond is between the #1 and #2 carbons in the molecule. Alpha-olefins such as 1-hexene may be used as co-monomers to give an alkyl branched polymer (see chemical structure below), although 1-decene is most commonly used ...

Global Olefin Polymerization Catalysts Market Size 2021 ...

The Olefin Polymerization Catalysts Global Market Research Report 2021 is a comprehensive case study of a company that analyzes its innovative business growth methodology and key factors such as key manufacturers, production costs and growth rates in key regions.

Olefin Polymerization with Homogeneous Ziegler−Natta ...

Weakly Coordinating Al-, Nb-, Ta-, Y-, and La-Based Perfluoroaryloxymetalate Anions as Cocatalyst Components for Single-Site Olefin Polymerization. Organometallics 2002, 21 (18), 3691-3702. DOI: 10.1021/om020087s.

Designing catalysts for olefin polymerization and ...

Apr 27, 2018· The development of high-performance olefin polymerization catalysts is a major driving force in polyolefin studies. ... little effect may be …

JP4306807B2 - Olefin polymerization components and ...

Olefin polymerization components and catalysts Download PDF Info ... polymerization Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no …

CN1726230A - Catalyst components for the …

The present invention relates to a catalyst component that is used for olefin (copolymerization) polymerization and in particular to being used for the preparation of LLDPE. The catalyst component comprises Mg, Ti, halogen and electron donor compounds (ED) of ether, ester, amine or nitrile and is characterized in that the mol ratio of Mg and Ti is more than 5; and the mol …

C30-45 Olefin Market global outlook and forecast 2021 -2027|

14 · C30-45 Olefin Market 2019 report contains an engaged financial, political, and natural examination of the components influencing the keyword industry. The report contains an investigation of the ...

Regulation of alkoxysilane on stereoregular polymerization ...

Jul 16, 2021· Among all these components, ED plays an important role in both catalytic activity and stereoregularity for ɑ-olefin polymerization . Since the application of ED in the Z-N catalysts in the early 1980s, lots of attention have been attracted to study the mechanism of ED effects in the ɑ-olefin polymerization [,,,,,, ].

ORGANOMETALLIC COMPOUNDS IN OLEFIN POLYMERIZATION

Olefin insertions into the M-R bond of (H2Si(L)2)MR+ for group 4 transition metals (Ti, Zr, and Hf) have been theoretically studied as model olefin insertions of olefin polymerization propagation ...

Metallacyclic metallocene complexes as catalysts for ...

Jan 01, 2006· This type of complex provides the essential metal carbon sigma bond for the catalytic olefin insertion in the polymerization process. 2. Known metallacyclic metallocene complexesMetallacyclic metallocene complexes are accessible from metallocene synthons and suitable components. For instance,,,,,,,,, :

EP0135973A2 - Olefin polymerization catalyst …

An olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgR'R" wherein R'is an alkoxide or aryloxide group and R" is an alkoxide or aryl-oxide group or halogen, with a halide of tetravalent titanium in the presence of a halohydrocarbon, and contacting the halogenated product with thionylchloride or an acid …

Olefin Polymerization Components - podatkizglowy.pl

A solid catalyst component for olefin polymerization, characterized by comprising (a) ... Components and catalysts for the polymerization of olefins: EP0601496A1 *

Use of Synthetic and Natural Zeolites for Fabricating ...

Aug 13, 2019· Scheme 1. Formation of zeolite-bonded alkylalumoxanes and immobilized zirconocene catalysts for olefin polymerization. To reveal the effect of the nature of a zeolitic support on the formation of bonded alumoxanes, thermal dehydration of zeolites and the dehydration with the use of AlMe 3 were studied ().It was shown that all water adsorbed on the …

Weakly Coordinating Al-, Nb-, Ta-, Y-, and La-Based ...

Weakly Coordinating Al-, Nb-, Ta-, Y-, and La-Based Perfluoroaryloxymetalate Anions as Cocatalyst Components for Single-Site Olefin Polymerization. Matthew V. Metz, Yimin Sun, Charlotte L. Stern, and ; Tobin J. Marks

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