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Tailor‐Made Polymers | Wiley Online Books

 · John Severn completed his Ph.D. at the University of Sussex and joined the group of Prof. R. van Santen at the Eindhoven University of Technology as a postdoc, working on the immobilization of alpha-olefin polymerization catalysts and the use of ...

One-Component Catalysts for Polymerization of Olefins

 · The catalysts for olefin polymerization may be divided into two vast classes according to the method of formation of the propagation center: two-component and one-component.'' Two-component systems are obtained by the interaction of transition metal compounds of groups IV-VIII of the periodic system with organometallic compounds of groups 1-111 elements (Ziegler-Natta catalysts).

Designing Polymerization Reaction Systems | AIChE

Designing Polymerization Reaction Systems. Important considerations in polymerization reactor design include heat removal, kinetics, and process dynamics, as well as polymer properties and product quality. Polymer reaction engineering is an interesting field, …

Catalyst component for olefin polymerization.

A catalyst component for olefin polymerization, prepared by bringing a titanium-containing solid which comprises (a) a metal oxide, (b) an organomagnesium compound represented by the following general formula: R 1>MgR2> wherein R1> and R2> each represents a hydrocarbon group containing from 1 to 20 carbon atoms, a halogen atom, or an OR3> group in which R3> represents a hydrocarbon group ...

EP1070729B1

olefin polymerization mixture bis compound Prior art date 1993-06-07 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Ion pairing in transition metal catalyzed olefin polymerization

 · The olefin polymerization process can be divided in three phases involving (1) activation of a neutral (usually 16e −) precursor, leading to an IP, (2) coordination of the olefin, with the consequent displacement of the counterion from a coordination site to the second coordination sphere, and (3) multiple migratory insertions of olefin into the M–R bond, resulting in the polymer chain (P ...

Recent advances in nickel mediated copolymerization of olefin with …

 · Cationic active sites responsible for olefin polymerization can be obtained by reaction of the neutral ligands with nickel precursors such as (DME)NiBr 2 and then activated by aluminum reagents. Dibromide complexes [N,N]NiBr 2 can be further methylated using MeMgBr and treated with H(Et 2 O) 2 BArF to give [N,N]NiMe(OEt 2 ) cationic Ni-Me species ( Fig. 3 a) [23] .

Olefin Polymerization with Ziegler-Natta Catalyst

 · Olefin Polymerization with Ziegler-Natta Catalyst. The Ziegler-Natta (ZN) catalyst, named after two chemists: Karl Ziegler and Giulio Natta, is a powerful tool to polymerize α-olefins with high linearity and stereoselectivity (Figure 1). A typical ZN catalyst system usually contains two parts: a transition metal (Group IV metals, like Ti, Zr ...

Catalytic Production of Olefin Block Copolymers via Chain Shuttling Polymerization

 · During the past 50 years, polyolefins have become, by far, the highest volume commercial class of synthetic polymers. Olefin polymerization catalysts have evolved during this time from heterogeneous mixtures to well-defined soluble molecules (), allowing chemists to understand and control the effects of catalyst structure on polymer composition and microstructure.

SPHERICAL CATALYST COMPONENT FOR OLEFIN POLYMERIZATIO…

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 ratio of ED and Ti is ...

FI Catalyst for Polymerization of Olefin | IntechOpen

 · Polymerization olefin catalyst components has been depicted in Figure 8 including a metal, ligand(s), a growing polymer chain, a coordinated olefin, and a cocatalyst [40-42]. As can bee seen in Figure 8, FI catalysts are heteroatom [O-, N] …

NMR chemical shift analysis decodes olefin oligo

 · olefin polymerization olefin oligomerization NMR spectroscopy chemical shift tensor analysis frontier molecular orbitals Oligomerization and polymerization processes are a highly active field of research (1 –5) and at the heart of the petrochemical industry, producing α-olefins and polyolefins, respectively, that are some of the most important commodity chemicals and polymers ().

Polymers | Special Issue : Olefin Polymerization and Polyolefin

 · Special Issue Information. Since the Nobel Prize winning discovery made by Ziegler and Natta, transition-metal-catalyzed olefin polymerization has enjoyed great success in both industry and academia. Currently, polyolefin materials constitute almost half of the 300 million tons of the worldwide plastics production.

Clathrochelates as olefin polymerization catalyst components

 · Clathrochelates have apparently not been suggested as components of catalysts for olefin polymerization. On the other hand, the ability to incorporate transition metals and/or Group 13 atoms in the apical (or capping) positions of clathrochelates provides an as-yet unexplored opportunity to use the unique electronics of clathrochelates for tuning an olefin polymerization reaction.

Polyolefin

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 for lubricant base stocks.

(: Olefin metathesis ) ,[1] 。,,。 2005·、··, ...

Solid catalyst components and catalysts for olefin polymerization

Solid catalyst components and catalysts for olefin polymerization - Patent JP-3745982-B2 - PubChem. National Center for Biotechnology Information. 8600 Rockville Pike, Bethesda, MD, 20894 USA. Contact. Policies. FOIA. National Library of Medicine. National Institutes of Health. Department of Health and Human Services.

What is Polymerization?

 · Lesson Summary. Polymerization is the process of forming larger macromolecules from simpler sub-units known as monomers. The two major types of polymerization are addition polymerization and ...

petroleum refining

Polymerization and alkylation The light gaseous hydrocarbons produced by catalytic cracking are highly unsaturated and are usually converted into high-octane gasoline components in polymerization or alkylation processes. In polymerization, the light olefins propylene and butylene are induced to combine, or polymerize, into molecules of two or three times their original molecular weight.

olefin | Description, Characteristics, & Types | Britannica

Olefin, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond. Olefins are important commercial petrochemicals and are produced through various methods, including fluid catalytic cracking. Learn …

WO2018158966A1

WO2018158966A1 - Metallocene compound, catalyst component for olefin polymerization and catalyst for olefin polymerization including same, and method for producing olefin polymer using catalyst for olefin polymerization - Google Patents Metallocene compound ...

Olefin Polymerization

 · Olefin Polymerization - Catalysts from Group 10 to Group 4. Download PDF Copy. Interview conducted by Dr. Changle Chen Nov 27 2011. The development of catalysts that are capable of polymerizing or copolymerizing functionalized vinyl monomers (CH2=CHX) by insertion mechanisms would enable the synthesis of new polyolefins with enhanced properties.

Scope of Olefin Polymerization Nickel Catalysts | Science

 · Scope of Olefin Polymerization Nickel Catalysts. K. Aleksander Ostoja Starzewski. Bayer AG, Central Research Department, 51368 Leverkusen, Germany. Todd R. Younkin. Arnold and Mabel Beckman Laboratories for Chemical Synthesis, California Institute of Technology, Pasadena, CA 91125, USA To whom correspondence should be addressed. Eric F. Connor ...

What is Controlled Radical Polymerization?

Controlled radical polymerization is a means of manufacturing highly branched three-dimensional macromolecules known as hyperbranched polymers. It might employ inimers, compounds containing an initiating group and a vinyl group in one molecule, or transmers, a compound containing a chain transfer group and a vinyl group in one molecule.