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Monday, November 2, 2020 | History

3 edition of Cationic polymerization of olefins found in the catalog.

Cationic polymerization of olefins

Joseph Paul Kennedy

Cationic polymerization of olefins

a critical inventory

by Joseph Paul Kennedy

  • 270 Want to read
  • 31 Currently reading

Published by Wiley in New York .
Written in English

    Subjects:
  • Alkenes.,
  • Polymerization.

  • Edition Notes

    StatementJoseph P. Kennedy.
    Classifications
    LC ClassificationsQD305.H7 K38
    The Physical Object
    Paginationxi, 337 p. :
    Number of Pages337
    ID Numbers
    Open LibraryOL5064082M
    ISBN 100471469092
    LC Control Number74030124

    Catalyst-controlled stereoselective cationic polymerization of vinyl ethers A. J. Teator and F. A. Leibfarth* The tacticity of vinyl polymers has a profound effect on their physical properties. Despite the well-developed stereoselective methods for the polymerization of propylene and other nonpolar a-olefins, stereoselective polymerization of Cited by: 9. These technologies will eventually be disclosed publicly. Dr. Lewis is in the process of co-authoring another book chapter and details will be forthcoming. Finally, we have invented a new form of aqueous carbocationic olefin polymerization. This will be publically disclosed prior to Dr. Lewis' Contributions to the Cationic Polymerization.


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Cationic polymerization of olefins by Joseph Paul Kennedy Download PDF EPUB FB2

Cationic polymerization of olefins: A critical inventory Hardcover – by Joseph P. Kennedy (Author)Cited by: Cationic polymerization of olefins: A critical inventory, J.

Kennedy, Wiley‐Interscience, New York,pp. $Cited by: 1. This book covers the proceedings of a symposium which was attended by researchers from all over the world who reported on and discussed recent advances in the field of catalytic polymerization of. Book Authors Professionals Researchers Institutions Librarians Corporations Societies Journal Editors Bookstores Government SUBJECTS.

Accounting Agriculture Agriculture Aquaculture Arts & Architecture Architecture Art & Applied Arts Graphic Design. THE THREE STAGES ON THE ROAD TO LIVING CARBOCATIONIC POLYMERIZATION. In retrospect, living cationic polymerization of olefins came about in three landmark events: (1) accomplishing “controlled” initiation, (2) recognizing reversible termi- nation, and (3) finding conditions to suppress chain trans- fer.

Description. This book covers the most important topics concerning cationic Ziegler-Natta and ring-opening metathesis polymerization of cycloolefins. The work describes the major pathways that cycloolefins can follow under the action of specific catalytic systems, essentially vinyl and ring-opening polymerization, Book Edition: 1.

Kennedy J.P., Faust R., Mishra M.K., Fehervari A. () Living Cationic Olefin Polymerization. In: Fontanille M., Guyot A. (eds) Recent Advances in Mechanistic and Synthetic Aspects of : J. Kennedy, R. Faust, M. Mishra, A.

Fehervari. The Chemistry of Cationic Polymerization covers the fundamental aspects of organic chemistry that provide significant insights into the Cationic polymerization of olefins book facets of cationic polymerization processes and products. Each chapter deals with individual and groups of monomers.

Considerable chapters examine the chemistry of oxygen Edition: 1. Accordingly, the present invention is a liquid phase process for the cationic polymerisation of a feedstock comprising 1-olefins to a polymer predominating in terminal unsaturation at a temperature Cited by: Kinetics of Cationic Polymerization of Olefins.

Cationic polymerizations differ from free-radical and homogeneous anionic syntheses of high polymers in that the cationic systems have not so far been fitted into a generally useful kinetic framework involving fundamental reactions like initiation, Cationic polymerization of olefins book, and so on.

To explain the reasons for the peculiar problems with cationic polymerizations we will, however, postulate a conventional polymerization. Telechelic polymers by cationic ring-opening polymerization. Makromolekulare Chemie. Macromolecular Symposia6 (1), DOI: /masy A.

Martinez, F. Mijangos, L. Leon. Effect of the Counterion on the Cationic Polymerization Rate of. Living cationic polymerization of olefins.

How did the discovery come about. Article (PDF Available) in Journal of Polymer Science Part A Polymer Chemistry 37(14) July with 31 ReadsAuthor: Joseph P Kennedy. Cationic polymerization of 1-olefins Download PDF Info Publication number USA.

USA US06/, USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords process according boron trifluorideCited by: Olefins such as isobutylene and styrene can be cationically polymerized in a controlled/living fashion under certain specific conditions.

The best systems tend to employ either TiCl 4 or BCl 3 coinitiators. Lewis base additives are used to suppress both protic initiation and propagation by free : R. Storey, C. Curry, T. Maggio. Book Details: Author: Joseph Paul Kennedy Published Date: 02 Jul Format: Hardback pages, ePub ISBN ISBN Country New York, United Kingdom; File name: Dimension: x mm Download: Cationic Polymerization of Olefins A Critical InventoryCationic Polymerization of.

Get this from a library. Cationic polymerization of olefins: a critical inventory. [Joseph Paul Kennedy]. This book comprises the contributions of several authors in the area of polymer characterization by atomic force microscopy of the polymer network structure formed in Ferroelectric Liquid Crystals Cells; polymerization by microwave irradiation method of starch/acrylic acid/acrylamide; polymerization of olefins; emulsion polymerization; ring opening polymerization; cationic polymerization of vinyl.

Cationic Polymerization and Insertion Chemistry in the Reactions of Vinyl Ethers with (α-Diimine)PdMe+ Species. Journal of the American Chemical Society(14), DOI: /jay. Eugene Y.-X. Chen. Coordination Polymerization of Polar Vinyl Monomers by Single-Site Metal by: T1 - Oligo- and Polymerization of Olefins.

AU - Kohn, Randolf. PY - /8. Y1 - /8. N2 - Metals play an important role in the catalysis of olefin polymerization. This chapter gives an overview of the different mechanistic pathways to polymerization: coordination, metathesis, cationic, anionic, and radical : Randolf Kohn.

Title: Electrophilic Reactions. (Book Reviews: Cationic Polymerization of Olefins. A Critical Inventory) Book Authors: Kennedy, Joseph P. Review Author. The cationic polymerization of isobutylene with H 2 O/ i Bu 2 AlCl and H 2 O/ i BuAlCl 2 nOR 2 (n = 0–1; R 2 O = Bu 2 O, Hex 2 O, i Pr 2 O) initiating systems in toluene as a solvent at −20 °C has been investigated.

The H 2 O/ i Bu 2 AlCl initiating system induced slow cationic polymerization of isobutylene to afford polyisobutylenes with high molecular weight (up to M n = 55 g mol Cited by: As explained before, DFT calculations using a cationic metallocene complex (H 2 SiCp 2 ZrMe +) as a model suggest that olefin polymerization is a process that involves intense electron exchange between a ligand and a metal.

Since all transition metals (even Mn and Fe) potentially possess the capability of olefin insertion, it is believed that Cited by: 3. In the book, fundamentals of both the new and old polymerization chemistry have been dealt with. The new chemistry has been given nearly equal space along with the old.

Sample Chapter(s) Chapter 1: Introduction ( KB) Contents: Introduction; Step Polymerization; Radical Polymerization; Anionic Polymerization; Coordination Polymerization. Advantages over traditional polymerization method.

Traditionally, polymerization of α-olefins was done by radical polymerization (Figure 4). Problem with this technique was that the formation of undesired allylic radicals leaded to branched polymers.

3 For example, radical polymerization of propene gived branched polymers with large molecular weight distribution. Babkin V.A. et al. Quantum-chemical aspects of the cationic polymerization of olefins, Ufa, n/a.

Quantum chemical methods of calculation of the complexes as initiators of cationic polymerization of olefins -- Ch. Quantum chemical calculation of complex Lewis and Brenstedt acids as the active centers of cationic polymerization of olefins -- Ch.

This book covers the proceedings of a symposium which was attended by researchers from all over the world who reported on and discussed recent advances in the field of catalytic polymerization of olefins.

Over two decades have elapsed since the discovery of the Ziegler-Natta catalyst. "Cationic Zirconocene Olefin Polymerization Catalysts Based on the Organo-Lewis Acid Tris(pentafluorophenyl)borane.

A Synthetic,Structural, Solution Dynamic, and Polymerization Catalytic Study". Journal of the American Chemical Society (22): – The complex mechanism of the carbocationic rearrangements leading to a variety of olefin (exo- endo- tri- and tetra-substituted) end groups in the cationic polymerization of isobutylene (IB.

Polymerization of Olefins by Friedel-Crafts Catalysts. Polymerization of Olefins by Friedel-Crafts Catalysts. NatureDevelopments in the theory of cationic polymerizationCited by: 7. Cationic Polymerization Many vinyl monomers readily polymerize in the presence of very small amounts of catalyst of the type used in Friedel-Crafts reactions.

Examples of effective catalysts are AlCl 3, AlBr 3, BF 3, TiCl 4, SnCl 4, and in some cases strong acids such as H 2 SO 4. I claim: 1. A liquid phase process for the cationic polymerisation of a feedstock comprising 1-olefins in the presence of boron trifluoride as catalyst at a temperature between ° and +50° C.

characterised in that the catalyst is a preformed complex of boron trifluoride and an alcohol and the contact time of the polymerisation reaction is at least 8 minutes such that at least 70% of the. In the cationic polymerization of a,/3-disubstituted olefins a few experi-mental results have been reported.

Overberger found that in the cationic polyrrierization of /3-methyistyrenes the trans-isomer was a little more reactive than the cis-isomer.

Plesch and his colleagues ()4. Stereospecific Catalytic Polymerization of α-Olefins α-olefins are often polymerized in the presence of stereospecific catalysts such as metallocenes or Ziegler-Natta catalysts.

1 These catalysts are able to restict the addition of monomer molecules to a specific regular orientation ().In the case of isotactic orientation, all alkyl groups are positioned at the same side of the molecule with. Cationic Polymerization of Isobutylene at Room Temperature Sergei V. Kostjuk,1 Hui Yee Yeong,2,3* Brigitte Voit2,3 1Research Institute for Physical Chemical Problems of the Belarusian State University, 14 Leningradskaya St., Minsk, Belarus 2Leibniz-Institut fu¨r Polymerforschung Dresden e.V., Hohe Strasse 6, D Dresden, Germany 3Organic Chemistry of Polymers, Technische Cited by: The Fundamentals of Catalytic Olefin Polimerization - Free download as Powerpoint Presentation .ppt /.pptx), PDF File .pdf), Text File .txt) or view presentation slides online.

The Fundamentals of Catalytic Olefin Polimerization Basics of initiation, propagation and termination Olefin polymerisation versus olefin oligomerization Chain transfer agents.

We claim: 1. A process for the cationic polymerization of a feedstock containing a 1-olefin which comprises polymerizing a 1-olefin in the liquid phase at a temperature from ° to ° C. in the presence of a catalyst composition comprising tin tetrachloride and an organic halide co-catalyst which is a source of cations which is substantially free of organometallic compounds to obtain a.

Ziegler-Natta polymerization of olefins - stereoselectivity CHEM Inorganic/Organometallic Chemistry Haomiao Xie & Xu Ye. Professor: Dr. Marcetta Y. Darensbourg. Outline • 1. Introduction of polymerization and history of Ziegler-Natta Catalysts. • cationic addition polymerization • anionic addition polymerizationFile Size: 1MB.

is the polymerization and copolymerization of olefins, and, closely related, the oligomerization of olefins. Both processes will be discussed in more detail in the following sections.

Olefin polymerization Polyolefins In Ziegler found that the polymerization of ethene to high molecular weight. Unlike anionic polymerization, termination can occur by anion - cation recombination, for example, as illustrated opposite.

Lots of other side reactions can occur, with trace amounts of water, as illustrated below, chain transfer to monomer, and so on. This makes it much more difficult to make a living polymer using cationic Size: 84KB.

More than 50 years have passed since Ziegler and Natta shared the Nobel Prize in Chemistry for their discovery of olefin polymerization catalysts.

The field of metal-catalysed polymerization has Cited by: In polymer chemistry, living polymerization is a form of chain growth polymerization where the ability of a growing polymer chain to terminate has been removed.

This can be accomplished in a variety of ways. Chain termination and chain transfer reactions are absent and the rate of chain initiation is also much larger than the rate of chain propagation.

The result is that the polymer chains.Reactions of cationic (allyl)Ni(II) complexes with 1,3-dienes and olefins: polymerization and mechanistic studiesAuthor: Abby R. O'Connor.