Metallocene Catalysed Polymerisation

Author : Walter Kaminsky
Publisher : iSmithers Rapra Publishing
Page : 142 pages
File Size : 55,5 Mb
Release : 1999
Category : Technology & Engineering
ISBN : 1859571956

Get Book

Metallocene-catalysed Polymerisation by Walter Kaminsky Pdf

In this review the activation and deactivation of the metallocene catalysts are discussed, and the stability of metallocenes. In industrial processes metallocenes are generally used on supports such as silica, alumina or magnesium chloride. Each procedure for generating a supported metallocene affects the catalyst and thus the polymerisation process, affording new variations. The methods and effects of supporting metallocenes are discussed. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further.

Author : George M. Benedikt,Brian L. Goodall
Publisher : Cambridge University Press
Page : 398 pages
File Size : 41,8 Mb
Release : 2008-12-10
Category : Science
ISBN : 9780080950426

Get Book

Metallocene Catalyzed Polymers by George M. Benedikt,Brian L. Goodall Pdf

It has been estimated that within just ten years, over half of all polyolefins will be made by using metallocene catalysts. This ground-breaking volume from PDL brings togetherùfor the first timeùwork from dozens of world-renowned experts on the subject. Fifty chapters of peer-reviewed content offer insights into applications in automotive components, food packaging, insulating films, non-woven fabrics and medical markets, among others.

Author : Walter Kaminsky
Publisher : Springer Science & Business Media
Page : 674 pages
File Size : 40,8 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9783642601781

Get Book

Metalorganic Catalysts for Synthesis and Polymerization by Walter Kaminsky Pdf

45 years after the discovery of transition metals and organometallics as cocatalysts for the polymerization of olefins and for organic synthesis, these compounds have not lost their fascination. The birthday of Karl Ziegler, the great pioneer in this metalorganic catalysis, is now 100 years ago. Polyolefins and polydienes produced by Ziegler-Natta catalysis are the most important plastics and elastomers. New impulses for the polymerization of olefins have been brought about by highly active metallocenes and other single site catalysts. Just by changing the ligands of the organometallic compounds, the structure of the polymers produced can be tailored in a wide manner. In invited lectures and posters, relevant aspects of the metalorganic catalysts for synthesis and polymerization are discussed in this book. This includes mechanism and kinetics, stereochemistry, material properties, and industrial applications.

Author : John Scheirs,Walter Kaminsky
Publisher : John Wiley & Sons
Page : 568 pages
File Size : 51,9 Mb
Release : 2000-01-21
Category : Family & Relationships
ISBN : UOM:39015048517166

Get Book

Metallocene-based Polyolefins, 2 Volume Set by John Scheirs,Walter Kaminsky Pdf

In the last three years, research into the nature and strength of metallocene-based materials has exploded. This is the first and only book to provide comprehensive coverage of the developments and advances in the field by such major polyolefin companies as Dow, Exxon, and Montell. The authors begin with overviews of metallocene catalysis and metallocene-based polyolefins, then discuss all areas of the technology, from applications to end-products.

Author : J. Karger-Kocsis
Publisher : Springer Science & Business Media
Page : 988 pages
File Size : 53,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401144216

Get Book

Polypropylene by J. Karger-Kocsis Pdf

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).

Author : R. Blom,A. Follestad,E. Rytter,M. Tilset,M. Ystenes
Publisher : Springer Science & Business Media
Page : 448 pages
File Size : 44,7 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9783642594656

Get Book

Organometallic Catalysts and Olefin Polymerization by R. Blom,A. Follestad,E. Rytter,M. Tilset,M. Ystenes Pdf

"Catalysis is more art than science", probably all of you have heard and even used this expression. Whether it is true or not, it alludes to the experience that new catalysts are hard to find, and near impossible to predict. Hard work and a lifetime of experience is invaluable. However, a keen mind might give insight into where to search, but not necessarily about where to find the answers. Historically, "quantum leaps" have often arisen from serendipity - we all know the story about the nickel-contaminated reactor that triggered further research towards the first coordination catalyst for ethene polymerization. Taking advan tage of this event, Karl Ziegler became the first chemist to earn both a Nobel prize and a fortune for the same invention. A broken NMR tube helped Walter Kaminsky discover the effect of high concentrations of methylaluminoxanes as co catalysts for metallocenes. When air reacted with the concentrated trim ethyl aluminum solution, sufficient amounts of methylaluminoxanes were formed, and the lazy catalyst dormant in the NMR tube suddenly became sensationally active. Ziegler and Kaminsky were lucky and had the genius needed to take advantage of their luck.

Author : Zhibin Guan
Publisher : Springer Science & Business Media
Page : 262 pages
File Size : 46,7 Mb
Release : 2009-03-31
Category : Science
ISBN : 9783540877509

Get Book

Metal Catalysts in Olefin Polymerization by Zhibin Guan Pdf

Polyolefin is a major industry that is important for our economy and impacts every aspect of our lives. The discovery of new transition metal-based catalysts is one of the driving forces for the further advancement of this field. Whereas the classical heterogeneous Ziegler-Natta catalysts and homogeneous early transition metal metallocene catalysts remain the workhorses of the polyolefin industry, in roughly the last decade, tremendous progress has been made in developing non-metallocene-based olefin polymerization catalysts. Particularly, the discovery of late transition metal-based olefin polymerization catalysts heralds a new era for this field. These late transition metal complexes not only exhibit high activities rivaling their early metal counterparts, but more importantly they offer unique properties for polymer architectural control and copolymerization with polar olefins. In this book, the most recent major breakthroughs in the development of new olefin polymerization catalysts, including early metal metallocene and non-metallocene complexes and late transition metal complexes, are discussed by leading experts. The authors highlight the most important discoveries in catalysts and their applications in designing new polyolefin-based functional materials.

Author : Samir Chikkali,Ashootosh V. Ambade,Bas de Bruin,Michael Shaver
Publisher : CRC Press
Page : 267 pages
File Size : 55,5 Mb
Release : 2017-08-03
Category : Science
ISBN : 9781351649957

Get Book

Metal-Catalyzed Polymerization by Samir Chikkali,Ashootosh V. Ambade,Bas de Bruin,Michael Shaver Pdf

The proposed book focusses on metal mediated/catalyzed “controlled/living radical polymerization” (CRP/LRP) methods. It surveys a wide variety of catalyzed polymerization reactions, making it essentially a “one stop” review in the field. A significant contribution to polymer science is “metathesis polymerization” discovered by Grubbs and others. The book will cover various metathesis polymerization methods and implications in polymer industry.

Author : Yury Kissin
Publisher : Elsevier
Page : 495 pages
File Size : 53,6 Mb
Release : 2008-03-10
Category : Technology & Engineering
ISBN : 0080557996

Get Book

Alkene Polymerization Reactions with Transition Metal Catalysts by Yury Kissin Pdf

During the past 30 years, the field of alkene polymerization over transition metal catalysts underwent several major changes: 1. The list of commercial heterogeneous Ziegler-Natta catalysts for the synthesis of polyethylene and stereoregular polyolefins was completely renewed affording an unprecedented degree of control over the polymer structure. 2. Research devoted to metallocene and other soluble transition-metal catalysis has vastly expanded and has shifted toward complexes of transition metals with multidentate ligands. 3. Recent developments in gel permeation chromatography, temperature-rising fractionation, and crystallization fractionation provided the first reliable information about differences between various active centers in transition-metal catalysts. 4. A rapid development of high-resolution 13C NMR spectroscopy resulted in greatly expanded understanding of the chemical and steric features of polyolefins and alkene copolymers. These developments require a new review of all aspects of alkene polymerization reactions with transition-metal catalysts. The first chapter in the book is an introductory text for researchers who are entering the field. It describes the basic principles of polymerization reactions with transition-metal catalysts, the types of catalysts, and commercially manufactured polyolefins. The next chapter addresses the principal issue of alkene polymerization catalysis: the existence of catalyst systems with single and multiple types of active centers. The subsequent chapters are devoted to chemistry and stereochemistry of elemental reaction steps, structures of catalyst precursors and reactions leading to the formation of active centers, kinetics of polymerization reactions, and their mechanisms. The book describes the latest commercial polymerization catalysts for the synthesis of polyethylenes and polypropylene The book provides a detailed description of the multi-center nature of commercial Ziegler-Natta catalysts. The book devotes specialized chapters to the most important aspects of transition metal polymerization catalysts: the reactions leading to the formation of active centers, the chemistry and stereochemistry of elemental polymerization steps, reaction kinetics, and the polymerization mechanism. The book contains an introductory chapter for researchers who are entering the field of polymerization catalysis. It describes the basic principles of polymerization reactions with transition-metal catalysts and the types of commercially manufactured polyolefins and copolymers The book contains over 2000 references, the most recent up to end of 2006.

Author : Joana Kettner
Publisher : Cuvillier Verlag
Page : 176 pages
File Size : 43,7 Mb
Release : 2019-05-14
Category : Science
ISBN : 9783736960039

Get Book

Kinetic investigation of different supported catalysts for the polymerization of propylene under industrially relevant conditions by Joana Kettner Pdf

Scope of the work is the kinetic investigation of two fourth generation Ziegler-Natta catalysts as well as a supported metallocene catalyst for the polymerization of propylene under industrially relevant conditions and the development of simplified phenomenological kinetic models describing the polymerizations. Therein, the influence of different reaction conditions (temperature, pressure, hydrogen concentration) and, in particular, the effect of prepolymerization on catalyst kinetics as well as on polymer characteristics are studied. The Ziegler-Natta catalysts were investigated under gas-phase conditions in a 5 l horizontal stirred tank reactor operating in semi-batch mode. Both catalysts showed a similar kinetic behavior as well as hydrogen response at the different reaction conditions. Applying a prepolymerization led to an increase in activity at higher reaction temperatures as well as an improved polymer morphology. The impact of prepolymerization is catalyst specific and depends on the catalyst activity reached at main polymerization temperature. The supported metallocene catalyst was studied under bulk conditions in liquid propylene using a special 250 ml reaction calorimeter. A focus was set on procedure development (in-situ and external prepolymerization) with the target of defined prepolymerization conditions and early access to the kinetic profile. Final kinetic measurements were carried out using the developed external prepolymerization procedure. Based on the experimental studies, simplified phenomenological kinetic models are developed for each catalyst type enabling the quantitative description of the polymerization reactions at the different reaction conditions including the effect of prepolymerization. Main hypothesis for the mathematical description of the prepolymerization effect is that particle overheating at the beginning of the polymerization is the major reason for lower activities obtained when no prepolymerization is applied. For particle modeling, a quasi-homogeneous particle model is assumed considering particle growth and particle heat-transfer. As similar kinetic behaviors were observed for both Ziegler-Natta catalysts, the same kinetic model can be used; differences can only be described by the catalyst specific amount of polymerization active component. A similar kinetic model approach is used to describe the bulk polymerization with metallocene catalyst. Differences regarding the different polymerization regime, in particular monomer concentration in the polymer particle, hydrogen concentration in liquid phase, are considered. With the estimated sets of kinetic parameters, average activities and average molecular weights can be calculated as well as activity profiles of the catalysts can be quantitatively described at the different reaction conditions.

Author : Devesh Tripathi
Publisher : iSmithers Rapra Publishing
Page : 112 pages
File Size : 54,6 Mb
Release : 2002
Category : Polypropylene
ISBN : 9781859572825

Get Book

Practical Guide to Polypropylene by Devesh Tripathi Pdf

Polypropylene is now the third largest consumed plastic material after polyethylene and polyvinyl chloride. This book discusses the advantages and disadvantages of working with polypropylene, offering practical comment on the available types of polypropylene, its mechanical properties and in-service performance, and processing. Comparisons with other common plastics are also provided, which highlight the advantages of this polyolefin.

Author : Eberhard W. Neuse
Publisher : Marcel Dekker
Page : 162 pages
File Size : 46,8 Mb
Release : 1970
Category : Metallocenes
ISBN : 082471489X

Get Book

Metallocene Polymers by Eberhard W. Neuse Pdf

Author : Walter Kaminsky
Publisher : Wiley-VCH
Page : 0 pages
File Size : 48,8 Mb
Release : 2006-08-18
Category : Technology & Engineering
ISBN : 3527317422

Get Book

Olefin Polymerization by Walter Kaminsky Pdf

With an enormous velocity, olefin polymerization has expanded to one of the most significant fields in polymers since the first industrial use about 50 years ago. In 2005, 100 million tons of polyolefins were produced - the biggest part was catalyzed by metallorganic compounds. The Hamburg Macromolecular Symposium 2005 with the title "Olefin Polymerization" involved topics such as new catalysts and cocatalysts, kinetics, mechanism and polymer reaction engineering, synthesis of special polymers, and characterization of polyolefins. The conference combined scientists from different disciplines to discuss latest research results of polymers and to offer each other the possibility of cooperation. This is reflected in this volume, which contains invited lectures and selected posters presented at the symposium.

Author : M. Terano,K. Soga
Publisher : Elsevier
Page : 415 pages
File Size : 51,8 Mb
Release : 1994-11-01
Category : Science
ISBN : 0080887538

Get Book

Catalyst Design for Tailor-Made Polyolefins by M. Terano,K. Soga Pdf

Recent development of olefin polymerization catalysts has caused marked changes in both industrial and academic research. Industrial use of homogeneous metallocene catalysts has already begun in the fields of high density polyethylene and syndiotactic polypropylene. Moreover, important data have been obtained from academic investigations which have proved useful for understanding conventional heterogeneous Ziegler-Natta catalysts. From the industrial viewpoint, however, heterogeneous high-yield catalysts seem to be more important. The present volume contains invited lectures and contributed papers. The following topics are covered: (1) Heterogeneous Catalysts, (2) Metallocene Catalysts and (3) New Trends in the Polyolefin Industry.

Author : Timo Repo
Publisher : Unknown
Page : 100 pages
File Size : 52,6 Mb
Release : 1997
Category : Electronic
ISBN : 9529092873

Get Book

Studies of Steric Interactions in Metallocene by Timo Repo Pdf