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New Group Four Complexes And Their Use As Homogeneous Polymerization Catalysts For The Production Of Polyolefins
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Book Synopsis New Group Four Complexes and Their Use as Homogeneous Polymerization Catalysts for the Production of Polyolefins by : John J. Esteb
Download or read book New Group Four Complexes and Their Use as Homogeneous Polymerization Catalysts for the Production of Polyolefins written by John J. Esteb and published by . This book was released on 2001 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Group Four Organometallic Complexes and Their Use as Homogeneous [alpha]-olefin Polymerization Catalysts by : Patrick Foster
Download or read book New Group Four Organometallic Complexes and Their Use as Homogeneous [alpha]-olefin Polymerization Catalysts written by Patrick Foster and published by . This book was released on 1997 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Polyolefin Architectures Through the Development of Living and Stereoselective Group IV Phenoxyketimine and Phenoxyamine Olefin Polymerization Catalysts by : Joseph B Edson
Download or read book New Polyolefin Architectures Through the Development of Living and Stereoselective Group IV Phenoxyketimine and Phenoxyamine Olefin Polymerization Catalysts written by Joseph B Edson and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the pioneering work by Ziegler and Natta in the 1950s on metalcatalyzed olefin polymerization, decades of research have led to the development of catalysts capable of furnishing a wide variety of polymers. Early work focused on heterogeneous catalysts, but the later development of homogeneous catalysts provided mechanistic insights that have allowed researchers to develop catalysts that provide access and control over specific polymer microstructures. The majority of commercial polyolefins has traditionally been limited to homopolymers, random copolymers, or blends thereof. In the past decade however, the development of olefin polymerization catalysts that are living have now allowed access to virtually a limitless number of new polyolefin architectures. Despite the fact that a living polymerization system is capable of producing only one polymer chain per metal center, the real advantage lies in the ability to synthesize well-defined block copolymers and identify new materials with promising properties. Our efforts have focused on C2-symmetric bis(phenoxyketimine) titanium dichloride complexes and C1-symmetric phenoxyamine zirconium and hafnium dibenzyl complexes supported by an sp3-C donor. We have shown that upon activation, these complexes can catalyze the living and isoselective polymerization of !-olefins. Using these, the synthesis of a number of new block copolymers featuring semicrystalline isotactic polypropylene segments and amorphous poly(ethylene-co-propylene) segments was accomplished. The resultant block copolymers displayed elastomeric behavior and excellent mechanical properties. We have further shown that catalysts derived from the C1-symmetric phenoxyamine zirconium and hafnium dibenzyl complexes are capable of the cyclopolymerization of 1,5-hexadiene. The resultant polymers were shown to have a previously unreported cis-isotactic microstructure.
Book Synopsis Progress in Olefin Polymerization Catalysts and Polyolefin Materials by : Takeshi Shiono
Download or read book Progress in Olefin Polymerization Catalysts and Polyolefin Materials written by Takeshi Shiono and published by Elsevier. This book was released on 2011-09-22 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First Asian Polyolefin Workshop introduces the recent developments and the research activities on polyolefin technology in Asia, which is becoming one of the important places in technology as well as in economy. Asian Countries have experienced remarkable economic growth in the last decade as represented by China. The Asian Polyolefin Workshop (APO) was planned to provide a venue for Asian scientists and engineers identifying and exploring the areas of common interests. The workshop was held in Nara on December 7th-9th, 2005, with more than 100 participants from China, Israel, India, Japan, Korea, Russia, Spain and Thailand. The following research topics were covered with 34 oral and 37 poster presentations; 1) Heterogeneous olefin polymerization catalysts Traditional Ziegler-Natta, Phillips, heterogenized metallocene and post metallocenes 2) Homogeneous olefin polymerization catalysts Traditional Ziegler-Natta, metallocene and post metallocenes 3) Precise synthesis of new polyolefins 4) Structure and properties of polyolefins 5) Engineering aspects of olefin polymerization * Presents the latest proceedings on polyolefin technology * The first book contributed by almost all the distinguished scientists in Asian countries* Contains papers not only from academia but also from industry
Book Synopsis Handbook of Polymer Synthesis, Characterization, and Processing by : Enrique Saldivar-Guerra
Download or read book Handbook of Polymer Synthesis, Characterization, and Processing written by Enrique Saldivar-Guerra and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering a broad range of polymer science topics, Handbook of Polymer Synthesis, Characterization, and Processing provides polymer industry professionals and researchers in polymer science and technology with a single, comprehensive handbook summarizing all aspects involved in the polymer production chain. The handbook focuses on industrially important polymers, analytical techniques, and formulation methods, with chapters covering step-growth, radical, and co-polymerization, crosslinking and grafting, reaction engineering, advanced technology applications, including conjugated, dendritic, and nanomaterial polymers and emulsions, and characterization methods, including spectroscopy, light scattering, and microscopy.
Book Synopsis Functionalization of Polyolefins by : T. C. Mike Chung
Download or read book Functionalization of Polyolefins written by T. C. Mike Chung and published by Elsevier. This book was released on 2002-02-04 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyolefins are the most widely used commercial polymers and their functionalization has been a long standing scientific challenge and an industrially important area. In recent decades significant progress has been made in the area, with exciting results reported in many journals. Functionalization of Polyolefins is the first book to summarize the significant experimental results on the functionalization of polyolefins and classify them into several chemical methods (shown in each chapter of this book). The book also provides an update on the functional polyolefin materials available today. The two key subject categories covered are: Chemical approaches in the functionalization of polyolefins New available polyolefin materials and their potential applications The book includes: The historic development and future prospects for polyolefins Functionalization chemistry, classified into four general approaches Chemical approaches with experimental results Functionalization approaches The book provides an invaluable reference for researchers in industry and academia interested in functionalization chemistry and polymers. It has been developed through Professor Chung's own teaching experience, both at Pennsylvania State University and on short courses. It is therefore ideally suited as a core text for advanced polymer chemistry and courses on polyolefins and polymers, as well as being a useful supplementary reference for introductory courses on polyolefin chemistry and materials. T.C. Mike Chung is Professor of Polymer Science in the Materials Science and Engineering Department, Pennsylvania State University, USA. He is one of the most experienced people in the field of polyolefin functionalization, with a wide-ranging knowledge gained through many years of experience both in academia and industry. Shows the available functionalisation approaches with a discussion of their scope and limitations Written by one of the most experienced people in this field
Author :Giuliano Giambastiani Publisher :Springer Science & Business Media ISBN 13 :9048138159 Total Pages :296 pages Book Rating :4.0/5 (481 download)
Book Synopsis Olefin Upgrading Catalysis by Nitrogen-based Metal Complexes I by : Giuliano Giambastiani
Download or read book Olefin Upgrading Catalysis by Nitrogen-based Metal Complexes I written by Giuliano Giambastiani and published by Springer Science & Business Media. This book was released on 2011-04-29 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights key advances that have occurred in the field of olefin conversion in recent years. The role of homogenous transition metal catalysts which contain an imine functionality is emphasized; their potential applications in the processing and upgrade of olefins to a wide variety of commodity products of very high industrial value is also explored. On the threshold of the fiftieth anniversary of the Noble Prize to Ziegler and Natta, this book gives a critical summary of the state of the art developments in the fascinating and rapidly developing field of the olefin polymerization, oligomerization, and co-polymerization catalysis.
Book Synopsis Handbook of Polyolefins by : Cornelia Vasile
Download or read book Handbook of Polyolefins written by Cornelia Vasile and published by CRC Press. This book was released on 2000-06-21 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: A handbook on polyolefins. This second edition includes new material on the structure, morphology and properties of polyolefin (PO) synthesis. It focuses on synthetic advances, the use of additives, special coverage of PO blends, composites and fibres, and surface treatments. It also addresses the problem of interfacial and superficial phenomena.
Book Synopsis Polyolefins as Media to Entrap and Study Homogeneous Catalysts by : David Robert Treadwell
Download or read book Polyolefins as Media to Entrap and Study Homogeneous Catalysts written by David Robert Treadwell and published by . This book was released on 1990 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymeric Dispersions: Principles and Applications by : J.M. Asua
Download or read book Polymeric Dispersions: Principles and Applications written by J.M. Asua and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and up to date survey of the science and technology of polymeric dispersions. The book discusses the kinetics and mechanisms of polymerization in dispersed media, examines the processes controlling particle morphology, presents both off-line and on-line methods for the characterization of polymer colloids, considers reactor engineering and control, and covers a wide variety of applications, such as latex paint formulations, encapsulation of inorganic particles, reactive latexes, adhesives, paper coating, and biomedical and pharmaceutical applications. Audience: A valuable resource for scientists and engineers, academic and industrial, who are involved in the manufacture or application of polymeric dispersions.
Book Synopsis Development of Functionalized Polymers Using Bis(phenoxyimine)titanium and [alpha]-diimineNickel(II) Catalysts for the Production of New Polyolefin Architectures by : Amelia Marie Anderson
Download or read book Development of Functionalized Polymers Using Bis(phenoxyimine)titanium and [alpha]-diimineNickel(II) Catalysts for the Production of New Polyolefin Architectures written by Amelia Marie Anderson and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decades of research in the area of metal-catalyzed olefin polymerization, since the initial discoveries by Ziegler and Natta in the 1950s, has lead to the development of a wide variety of transition metal catalysts as well as numerous polymer architectures. Although early work in the field focused on heterogeneous catalysis, Kaminsky's discovery of the scavenger/activator methylaluminoxane in 1980 facilitated a renaissance in the area of homogeneous catalysts. Today, many commercial polyolefin materials are still limited to linear homopolymers, random copolymers, or blends thereof. Therefore, our efforts have focused on the endfunctionalization and random incorporation of polar functional groups into polyolefins to produce polymers with improved properties and more complex architectures than traditional linear polymers. Initial work in this area focused on the development of well-defined long-chain branched polymers from end-functionalized polypropylene. Although many star polymers have been produced using anionic, cationic and radical methods, semicrystalline polypropylene materials with similar structures from coordinationinsertion polymerization were not known. Using a non-living bis(phenoxyimine)titanium catalyst, allyl-terminated syndiotactic polypropylene was produced and utilized in the production of alcohol-, azide- and amine-terminated polymers. These end-functionalized macromolecules were employed in the synthesis of a variety of well-defined branched polymers including star, miktoarm star and H- polymers. In an effort to produce branched polyolefin materials with high molecular weight, a norbornene-terminated polymer was synthesized from the allyl-terminated syndiotactic polypropylene. Using ring-opening metathesis polymerization, a number of high molecular weight polypropylene comb polymers were produced. All of the branched, syndiotactic polypropylene materials were analyzed further in an effort to related branching with observed polymer properties. To produce polyolefins with improved properties, a series of random copolymers derived from propylene and a polar, hydrogen bonding monomer were produced using Ni(II) [alpha]-diiminecatalysts. By varying the reaction temperature, hydrogen bonding polypropylene materials with a range of microstructures were produced. At high reaction temperatures, regioirregular, amorphous polypropylene was obtained, whereas, decreasing reaction temperature lead to highly regioregular, isotactic polypropylene. Utilizing the living nature of the Ni(II) [alpha]-diiminecatalysts, a series of triblock copolymers containing hydrogen bonding moieties in the midblock were also produced. The mechanical properties of all materials were investigated and generally observed to improve upon incorporation of small amounts (~1%) of the ureidopyrimidinone. For the branched and hydrogen bonding polymer reported herein, functionalization of polypropylene allowed for the synthesis of new polyolefin architectures.
Book Synopsis Beyond Metallocenes by : Abhimanyu O. Patil
Download or read book Beyond Metallocenes written by Abhimanyu O. Patil and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past 15 years have witnessed tremendous advances in the design and use of organometallic complexes as precatalysts for olefin polymerization. Most recently, an intense search has been started in next-generation single-site catalysts. New approaches have been taken to ligand design. This research has yielded extraordinary results such as catalysts with activities as high or higher than those of conventional metallocenes, stereospecific and living polymerizations, and amazing new polymer structures such as highly-branched ethylene homopolymers. This volume presents some of the recent disclosures in this exciting and rapidly expanding field, featuring papers by some of the leading investigators.
Book Synopsis Organometallics in Process Chemistry by : Thomas J. Colacot
Download or read book Organometallics in Process Chemistry written by Thomas J. Colacot and published by Springer Nature. This book was released on 2020-04-01 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gives an overview of the applications of organometallic chemistry in process chemistry relevant to the current topics in synthetic chemistry. This volume starts with an introduction on the historical development of organometallics in process chemistry and is followed by chapters dealing with the last five years’ development in various organometallic reaction types such as the challenging cross coupling process, construction of 3.1.0 bicycles, pressure and transfer hydrogenations of historically challenging compounds such as esters, utilization of carbon dioxide for making organic compounds by flow process, drug synthesis and metal detection and scavenging in the finished APIs. A chapter by Colacot et.al., is also devoted to the process development and structural understanding of organometallic catalysts with particular emphasis to LnPd(0) catalysts. An academia – industry collaborated chapter on the use of water as a solvent for organometallic processes is included in this book.
Book Synopsis Antioxidant Polymers by : Giuseppe Cirillo
Download or read book Antioxidant Polymers written by Giuseppe Cirillo and published by John Wiley & Sons. This book was released on 2012-06-07 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antioxidant Polymers is an exhaustive overview of the recent developments in the field of polymeric materials showing antioxidant properties. This research area has grown rapidly in the last decade because antioxidant polymers have wide industry applications ranging from materials science to biomedical, pharmaceuticals and cosmetics.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2001 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Group 4 Complexes Bearing Tridentate Aryloxide-Based Ancillary Ligands by : Ka-Ho Tam
Download or read book Group 4 Complexes Bearing Tridentate Aryloxide-Based Ancillary Ligands written by Ka-Ho Tam and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Group 4 Complexes Bearing Tridentate Aryloxide-based Ancillary Ligands: Synthesis, Characterization and Application as Olefin Polymerization Catalysts" by Ka-ho, Tam, 譚家豪, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled GROUP 4 COMPLEXES BEARING TRIDENTATE ARYLOXIDE- BASED ANCILLARY LIGANDS: SYNTHESIS, CHARACTERIZATION AND APPLICATION AS OLEFIN POLYMERIZATION CATALYSTS Submitted by Tam Ka Ho for the degree of Doctor of Philosophy at The University of Hong Kong in 2006 The preparation, characterization, crystal structures and olefin polymerization behavior of a class of Group 4 complexes, and in particular the Zr(IV) derivatives 1 1 [Zr(L )Cl (D)] [H L = 2,6-di(3-tert-butyl-5-methylphen-2-ol)pyridine; D = ethers, 2 2 ketones and Cl(HPR )], have been undertaken. These [O, N, O] catalysts exhibit excellent activities with MAO for ethylene polymerization. Studies to assess the impact of the donor group during catalysis suggest that the same active species is generated and the donor does not play an active role. Superior activities were observed with the Bu Al/Ph CB(C F ) cocatalyst in ethylene polymerization and - 3 3 6 5 4 -1 -1 propylene copolymerization (36,590 and 15,700 g mmol h respectively). Insight into the behavior of the catalytic system with MAO has been derived from gel permeation chromatography and NMR analyses of the polymers prepared under 1 13 different reaction conditions. H and C NMR end-group analyses reveal resonances for saturated methyl chain-end groups only, and undetectable levels of unsaturated vinyl chain ends. This indicates that for the polymerization chain-transfer mechanism, the conventional β-H transfer reactions are insignificant and the unusual chain transfer to Al pathway is vastly dominant. Group 4 complexes supported by unsymmetric tridentate [O, N, O] ligands bearing different substituents on the two aryloxide rings have been prepared, in order to develop new catalytic systems capable of stereospecific α-olefin polymerization. Their activities for ethylene polymerization with MAO are significantly lower than the symmetric [O, N, O] analogues. A number of group 4 bis(benzyl) complexes supported by tridentate pyridine-2- phenolate-6-aryl [O, N, C] ligands, with alkyl and halogen substituents at the R position ortho to the metal, have been prepared. This enabled direct comparison with the CF -substituted [O, N, C] analogues, which were recently reported to exhibit novel C-H---F-C contacts in solution with potential applications for attractive ligand---polymer interactions. The molecular structure of the Zr derivative bearing an ortho-Cl group was determined, revealing the benzyl moieties in an unusual 'anti, anti' configuration. Saliently, this polyethylene catalyst in conjunction with Bu Al/Ph CB(C F ) displayed the best activity thus far observed for [O, N, C] 3 3 6 5 4 -1 -1 catalysts (8630 g mmol h ). A series of group 4 bis(benzyl) complexes supported by newly designed [O, C, N] ligands bearing R substituents ortho to the metal has been prepared, such that the σ- aryl moiety resides trans to the alkyl/polymer chain, and catalyst decomposition pathways such as olefin insertion into the M-C(sp ) bond are impeded. The crystal structure of the CF -substituted hafnium(IV) complex features weak intramolecular 31 C-H---F-C (CF ---methylene) interactions. The H NMR spectra of [M(O, C, N- CF )(CH Ph) ] analogues revealed coupling (assigned to J [via M---F] for Hf and
Download or read book Polypropylene written by J. Karger-Kocsis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt: My heart sank when I was approached by Dr Hastings and by Professor Briggs (Senior Editor of Materials Science and Technology and Series Editor of Polymer Science and Technology Series at Chapman & Hall, respectively) to edit a book with the provisional title Handbook of Poly propylene. My reluctance was due to the fact that my former book [1] along with that of Moore [2], issued in the meantime, seemed to cover the information demand on polypropylene and related systems. Encour aged, however, by some colleagues (the new generation of scientists and engineers needs a good reference book with easy information retrieval, and the development with metallocene catalysts deserves a new update!), I started on this venture. Having some experience with polypropylene systems and being aware of the current literature, it was easy to settle the titles for the book chapters and also to select and approach the most suitable potential contributors. Fortunately, many of my first-choice authors accepted the invitation to contribute. Like all editors of multi-author volumes, I recognize that obtaining contributors follows an S-type curve of asymptotic saturation when the number of willing contributors is plotted as a function of time. The saturation point is, however, never reached and as a consequence, Dear Reader, you will also find some topics of some relevance which are not explicitly treated in this book (but, believe me, I have considered them).
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