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Author : Jon A. Debling
Publisher :
ISBN 13 :
Total Pages : 498 pages
Book Rating : 4.:/5 (89 download)
Download or read book Modeling Particle Growth and Morphology of Impact Polypropylene Produced in the Gas Phase written by Jon A. Debling and published by . This book was released on 1997 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Djallel Bouzid
Publisher :
ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (758 download)
Download or read book Interaction Between the Polymerisation Process and Particle Morphology written by Djallel Bouzid and published by . This book was released on 2004 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this thesis is to elucidate how the rubber phase produced in the copolymerisation step is distributed inside growing particles of high impact polypropylene, and how the amount of rubber incorporated in the original polypropylene matrix influences the overall morphology and mechanical properties of the final product. To this end, polymer was made under different conditions, and the products were characterised and analysed in order to attempt to understand how the morphology of the isotactic polypropylene matrix changes during particle growth, how rubber flows in the porous network, and how the EPR arrives at, and pools on the surface of the particle. All of these phenomena are obviously dependent on each other, which complicates the problem. A representation which incorporates the rheological properties of the copolymer combined with the structure of the homopolymer polypropylene matrix is probably a more realistic approach to take.
Author :
Publisher :
ISBN 13 :
Total Pages : 994 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Bertucco
Publisher : Elsevier
ISBN 13 : 0080533949
Total Pages : 684 pages
Book Rating : 4.0/5 (85 download)
Download or read book High Pressure Process Technology: Fundamentals and Applications written by A. Bertucco and published by Elsevier. This book was released on 2001-10-15 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clear evidence of increasing demands in the processing industry prompted the editors and authors to publish a new book about High Pressure Process Technology: Fundamentals and Applications.This book presents the latest knowledge regarding the high pressure processing aspects combined with that about the modeling, the design and the operation of safe and reliable high pressure plants and equipment. This treatment and selection of the subjects is stimulating and unique. Consisting of nine chapters, each subdivided into several sections, the book addresses the high pressure aspects, providing well selected correlated information connected with a comprehensive overview together with a large number of references. The main body of the first eight chapters refers to subjects like high pressure in general, the thermodynamics and kinetics of the fluids involved, the design of high pressure equipment, the modeling and design of reactors, separation and fractionation units, the safety aspects, the control and economics.In the extended last chapter, examples of promising high pressure applications are explained, such as chemical and enzymatic reactions in supercritical solvents, hydrogenation under supercritical conditions, supercritical water oxidation, polymerization with metallocene catalysts, supercritical extraction, fractionation and precipitation, supercritical pharma processing, ultra-high pressure sterilization and supercritical dry-cleaning.
Author : Jorge Jardim Zacca
Publisher :
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.:/5 (891 download)
Download or read book Distributed Parameter Modelling of the Polymerization of Olefins in Chemical Reactors written by Jorge Jardim Zacca and published by . This book was released on 1995 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexandra Romina Albunia
Publisher : Springer
ISBN 13 : 3030034763
Total Pages : 280 pages
Book Rating : 4.0/5 (3 download)
Download or read book Multimodal Polymers with Supported Catalysts written by Alexandra Romina Albunia and published by Springer. This book was released on 2019-01-16 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of polyolefine production, including several recent breakthrough innovations in the fields of catalysis, process technology, and materials design. The industrial development of polymers is an extraordinary example of multidisciplinary cooperation, involving experts from different fields. An understanding of structure-property and processing relationships leads to the design of materials with innovative performance profiles. A comprehensive description of the connection between innovative material performance and multimodal polymer design, which incorporates both flexibility and constraints of multimodal processes and catalyst needs, is provided. This book provides a summary of the polymerization process, from the atomistic level to the macroscale, process components, including catalysts, and their influence on final polymer performance. This reference merges academic research and industrial knowledge to fill the gaps between academic research and industrial processes. · Connects innovative material performance to the flexibility of multimodal polymer design processes; · Provides a comprehensive description of the polymerization process from the atomic level to the macroscale; · Presents a polyhedric view of multimodal polymer production, including structure, property, and processing relationships, and the development of new materials.
Author : Dennis Pao-Chang Lo
Publisher : Ann Arbor, Mich. : University Microfilms International
ISBN 13 :
Total Pages : 464 pages
Book Rating : 4.:/5 (89 download)
Download or read book Some Challenges in Ethylene Polymerization written by Dennis Pao-Chang Lo and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2003 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sunggyu Lee
Publisher : Taylor & Francis US
ISBN 13 : 9780824755607
Total Pages : 682 pages
Book Rating : 4.7/5 (556 download)
Download or read book Encyclopedia of Chemical Processing written by Sunggyu Lee and published by Taylor & Francis US. This book was released on 2006 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collecting information of vital interest to chemical, polymer, mechanical, electrical, and civil engineers, as well as chemists and chemical researchers, this "Encyclopedia "supplies nearly 350 articles on current design, engineering, science, and manufacturing practices-offering expertly written articles on technologies at the forefront of the field to maximize and enhance the research and production phases of current and emerging chemical manufacturing practices and techniques.
Author : Shreyas Chakravarti
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.:/5 (89 download)
Download or read book Olefin Polymerization with Supported Metallocene Catalysts written by Shreyas Chakravarti and published by . This book was released on 2000 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joana Kettner
Publisher : Cuvillier Verlag
ISBN 13 : 3736960034
Total Pages : 176 pages
Book Rating : 4.7/5 (369 download)
Download or read book Kinetic investigation of different supported catalysts for the polymerization of propylene under industrially relevant conditions written by Joana Kettner and published by Cuvillier Verlag. This book was released on 2019-05-14 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Sunggyu Lee
Publisher : CRC Press
ISBN 13 : 1351237683
Total Pages : 3338 pages
Book Rating : 4.3/5 (512 download)
Download or read book Encyclopedia of Chemical Processing (Online) written by Sunggyu Lee and published by CRC Press. This book was released on 2005-11-01 with total page 3338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition Encyclopedia supplies nearly 350 gold standard articles on the methods, practices, products, and standards influencing the chemical industries. It offers expertly written articles on technologies at the forefront of the field to maximize and enhance the research and production phases of current and emerging chemical manufacturing practices and techniques. This collecting of information is of vital interest to chemical, polymer, electrical, mechanical, and civil engineers, as well as chemists and chemical researchers. A complete reconceptualization of the classic reference series the Encyclopedia of Chemical Processing and Design, whose first volume published in 1976, this resource offers extensive A-Z treatment of the subject in five simultaneously published volumes, with comprehensive indexing of all five volumes in the back matter of each tome. It includes material on the design of key unit operations involved with chemical processes; the design, unit operation, and integration of reactors and separation systems; process system peripherals such as pumps, valves, and controllers; analytical techniques and equipment; and pilot plant design and scale-up criteria. This reference contains well-researched sections on automation, equipment, design and simulation, reliability and maintenance, separations technologies, and energy and environmental issues. Authoritative contributions cover chemical processing equipment, engineered systems, and laboratory apparatus currently utilized in the field. It also presents expert overviews on key engineering science topics in property predictions, measurements and analysis, novel materials and devices, and emerging chemical fields. ALSO AVAILABLE ONLINE This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for both researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]
Author :
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.3/5 (91 download)
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Herman F. Mark
Publisher : Wiley-Interscience
ISBN 13 : 9780471287810
Total Pages : 754 pages
Book Rating : 4.2/5 (878 download)
Download or read book Encyclopedia of Polymer Science and Technology, Part 2 written by Herman F. Mark and published by Wiley-Interscience. This book was released on 2003 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third Edition is a completely new version in a new century of the Encyclopedia of Polymer Science and Technology. The new edition will bring the state-of-the-art up to the 21st century, with coverage of nanotechnology, new imaging and analytical techniques, new methods of controlled polymer architecture, biomimetics, and more. New topics covered include nanotechnology, AFM, MALDI, biomimetics, and genetic methods, of increasing importance since 1990 and will also bring up-to-date coverage of traditional topics of continuing interest. This edition will publish in 3 Parts of 4 volumes each. Each Part will be an A-Z selection of the newest articles available in the online edition of this encyclopedia. A list of the titles to appear in Part I can be viewed by clicking "What's New" at www.mrw.interscience.wiley.com/epst. Titles for Parts II and III will appear there as well when available.
Author : Miguel Angel Plata Acevedo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (113 download)
Download or read book High Impact Polypropylene - Structure Evolution and Impact on Reaction written by Miguel Angel Plata Acevedo and published by . This book was released on 2018* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on the effect of reaction conditions, in particular prepolymerization, on the particle morphology and how morphology influences process kinetics in the polymerization of heterophasic polypropylene. After establishing reproducibility and reference activity levels, a screening of the effect of homo and prepolymerization conditions on morphology was performed. Results showed for both catalysts studied, that prepo is required in order to obtain good activity and that addition of ethylene during prepolymerization is an effective handle to adjust the morphology. By addition of ethylene, bulk density of the resulting polymer is reduced and porosity is increased. Sorption measurements reveal for samples with lower bulk density faster mass-transfer rates. Activity in the matrix stage is for both catalysts basically not affected by ethylene in the prepo. Crystallinity of the homopolymers is not affected by ethylene in the prepo step. During the rubber-phase, the samples with ethylene in the prepo showed lower activities. There are indications that ethylene incorporation in the rubber step is higher for samples with ethylene during the prepolymerization. Simulation studies show that samples with ethylene in the prepo reduce the mass-transfer limitations for ethylene in the heco-stage, which helps to better exploit the catalyst capabilities for ethylene incorporation.
Author : Dennis B. Malpass
Publisher : John Wiley & Sons
ISBN 13 : 111846320X
Total Pages : 290 pages
Book Rating : 4.1/5 (184 download)
Download or read book Introduction to Industrial Polypropylene written by Dennis B. Malpass and published by John Wiley & Sons. This book was released on 2012-07-02 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory text is an important resource for new engineers, chemists, students, and chemical industry personnel to understand the technical aspects of polypropylene which is the 2nd largest synthetics polymer in manufactured output. The book considers the following topics: What are the principal types of polypropylene and how do they differ? What catalysts are used to produce polypropylene and how do they function? What is the role of cocatalysts and how have they evolved over the years? How are industrial polypropylene catalysts tested and the resultant polymer evaluated? What processes are used in the manufacture of polypropylene? What are the biopolymer alternatives to polypropylene? What companies are the major industrial manufacturers of polypropylene? What is the environmental fate of polypropylene?
Author : John J. McKetta Jr
Publisher : CRC Press
ISBN 13 : 9780824726133
Total Pages : 556 pages
Book Rating : 4.7/5 (261 download)
Download or read book Encyclopedia of Chemical Processing and Design written by John J. McKetta Jr and published by CRC Press. This book was released on 1997-11-11 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Vent Collection System, Design and Safety to Viscosity-Gravity-Contrast, Estimation"
Author : Clive Maier
Publisher : William Andrew
ISBN 13 : 0815518714
Total Pages : 456 pages
Book Rating : 4.8/5 (155 download)
Download or read book Polypropylene written by Clive Maier and published by William Andrew. This book was released on 1998-04-15 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polypropylene: The Definitive User's Guide and Databook presents in a single volume a panoramic and up-to-the-minute user's guide for today's most important thermoplastic. The book examines every aspectùscience, technology, engineering, properties, design, processing, applicationsùof the continuing development and use of polypropylene. The unique treatment means that specialists can not only find what they want but for the first time can relate to and understand the needs and requirements of others in the product development chain. The entire work is underpinned by very extensive collections of property data that allow the reader to put the information to real industrial and commercial use. Despite the preeminence and unrivaled versatility of polypropylene as a thermoplastic material to manufacture, relatively few books have been devoted to its study. Polypropylene: The Definitive User's Guide and Databook not only fills the gap but breaks new ground in doing so.Polypropylene is the most popular thermoplastic in use today, and still one of the fastest growing. Polypropylene: The Definitive User's Guide and Databook is the complete workbook and reference resource for all those who work with the material. Its comprehensive scope uniquely caters to polymer scientists, plastics engineers, processing technologists, product designers, machinery and mold makers, product managers, end users, researchers and students alike.
