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Author: Roger Brown Publisher: Elsevier ISBN: 0323154174 Category : Science Languages : en Pages : 361
Book Description
Pyrolytic Methods in Organic Chemistry: Application of Flow and Flash Vacuum Pyrolytic Techniques is concerned with the use of flow pyrolysis and flash vacuum pyrolysis in preparative organic chemistry. Topics covered include pyrolytic generation and reactions of free radicals, arynes, and cyclobutadienes; elimination reactions; rearrangements of carbenes and nitrenes in the gas phase; and fragmentation of cyclic and acyclic structures. Examples of the types of reaction for which flow and flash pyrolytic methods are well suited are provided. This book is comprised of nine chapters and begins by discussing the place of flow and flash vacuum pyrolytic methods in organic chemistry. The next chapter gives an account of apparatus and experimental methods, while the remaining chapters focus on pyrolytic reactions that are grouped together according to the nature of the overall process, the formal structure of the starting material, and mechanistic type. Reactions that are formally related because they involve elimination of a small fragment molecule X-X or X-Y from a larger molecular framework are examined, along with cleavage of carbocyclic systems. The final chapter presents examples of high-temperature rearrangements, focusing on electrocyclic reactions and cycloadditions involving mainly four or six electrons; reactions that proceed through diradical intermediates; and isomerizations of heterocyclic rings. This monograph is intended mainly for practicing academic and industrial organic chemists and for advanced and graduate students.
Author: Roger Brown Publisher: Elsevier ISBN: 0323154174 Category : Science Languages : en Pages : 361
Book Description
Pyrolytic Methods in Organic Chemistry: Application of Flow and Flash Vacuum Pyrolytic Techniques is concerned with the use of flow pyrolysis and flash vacuum pyrolysis in preparative organic chemistry. Topics covered include pyrolytic generation and reactions of free radicals, arynes, and cyclobutadienes; elimination reactions; rearrangements of carbenes and nitrenes in the gas phase; and fragmentation of cyclic and acyclic structures. Examples of the types of reaction for which flow and flash pyrolytic methods are well suited are provided. This book is comprised of nine chapters and begins by discussing the place of flow and flash vacuum pyrolytic methods in organic chemistry. The next chapter gives an account of apparatus and experimental methods, while the remaining chapters focus on pyrolytic reactions that are grouped together according to the nature of the overall process, the formal structure of the starting material, and mechanistic type. Reactions that are formally related because they involve elimination of a small fragment molecule X-X or X-Y from a larger molecular framework are examined, along with cleavage of carbocyclic systems. The final chapter presents examples of high-temperature rearrangements, focusing on electrocyclic reactions and cycloadditions involving mainly four or six electrons; reactions that proceed through diradical intermediates; and isomerizations of heterocyclic rings. This monograph is intended mainly for practicing academic and industrial organic chemists and for advanced and graduate students.
Author: S.C. Moldoveanu Publisher: Elsevier ISBN: 0080527167 Category : Science Languages : en Pages : 509
Book Description
Analytical pyrolysis is one of the many tools utilized for the study of natural organic polymers. This books describes in three parts the methodology of analytical pyrolysis, the results of pyrolysis for a variety of biopolymers, and several practical applications of analytical pyrolysis on natural organic polymers and their composite materials. Analytical pyrolysis methodology covers two distinct subjects, the instrumentation used for pyrolysis and the analytical methods that are applied for the analysis of the pyrolysis products. A variety of pyrolytic techniques and of analytical instruments commonly coupled with pyrolysis devices are given.The description of the results of pyrolysis for biopolymers and some chemically modified natural organic polymers is the core of the book. The main pyrolysis products of numerous compounds as well as the proposed mechanisms for their pyrolysis are described. In this part an attempt is made to present as much as possible the chemistry of the pyrolytic process of natural organic polymers.The applications of analytical pyrolysis include topics such as polymer detection used for example in forensic science, structure elucidation of specific polymers, and identification of small molecules present in polymers (anti-oxidants, plasticizers, etc.). Also, the degradation during heating is a subject of major interest in many practical applications regarding the physical properties of polymers. The applications to composite polymeric materials are in the fields of classification of microorganisms, study of a variety of biological samples, study of fossil materials, etc. Analytical pyrolysis can also be used for obtaining information on the burning area generate pyrolysates that have complex compositions. Their analysis is important in connection with health issues, environmental problems, and taste of food and cigarettes.Features of this book:• Presents analytical pyrolysis as a uniform subject and not as a conglomerate of scientific papers.• Puts together in an organized manner a large volume of available information in this specific field.• Provides original results which address subjects with relatively scarce information in literature.• Gives original views on subjects such as the parallel between the pyrolytic process and the ion fragmentation in mass spectrometry.• Includes the role of pyrolysis in the burning process.The three parts of the book are covered in 18 chapters, each divided into sections. Some sections are further divided by particular subjects. References are given for each chapter, and an effort has been made to include as much as possible from the available representative information. A few unpublished personal results are also included.
Author: Serban C. Moldoveanu Publisher: Elsevier ISBN: 0080455867 Category : Science Languages : en Pages : 714
Book Description
Analytical Pyrolysis of Synthetic Organic Polymers is a follow-up to Analytical Pyrolysis of Natural Organic Polymers, which is volume 20 of the series. The main focus of the book is on practical applications of analytical pyrolysis in synthetic organic polymer identification and characterization. The first part of the book has five chapters including an introduction, a discussion on physico-chemistry of thermal degradation of synthetic polymers and on instrumentation used in analytical pyrolysis, a chapter discussing what type of information can be obtained from analytical pyrolysis, and a chapter dedicated to the analysis and characterization of synthetic polymers.The second part systematically covers the analytical pyrolysis of various classes of synthetic polymers. Some theoretical background for the understanding of polymer structure using analytical pyrolysis is also discussed.* Includes broad coverage of organic synthetic macromolecules* Focuses on physico-chemistry of thermal degradation, and the analytical pyrolysis of various classes of synthetic polymers* Is well written and suitable for both researchers and chemists working in analytical chemistry or in synthetic polymers
Author: Serban C. Moldoveanu Publisher: Elsevier ISBN: 0080932150 Category : Science Languages : en Pages : 737
Book Description
Pyrolysis of Organic Molecules with Applications to Health and Environmental Issues, the 28th volume in the Techniques and Instrumentation in Analytical Chemistry series, gives a systematic and comprehensive description of pyrolysis of non-polymeric organic molecules. Pyrolysis is involved in many practical applications as well as in many common human activities, but harmful compounds can be generated in the process. The study of pyrolysis and of the formation of undesirable compounds as a result of pyrolytic processes is of considerable interest to chemists, chemical engineers, and toxicologists. - Pyrolysis results for compounds not previously studied or reported - Updated information from a large body of results published on pyrolysis of individual compounds or classes of compounds - Information on mechanisms and kinetics of numerous pyrolytic processes
Author: Shin Tsuge Publisher: Elsevier ISBN: 0444538933 Category : Science Languages : en Pages : 405
Book Description
In this data book, both conventional Py-GC/MS where thermal energy alone is used to cause fragmentation of given polymeric materials and reactive Py-GC/MS in the presence of organic alkaline for condensation polymers are compiled. Before going into detailed presentation of the data, however, acquiring a firm grip on the proper understanding about the situation of Py-GC/MS would promote better utilization of the following pyrolysis data for various polymers samples. This book incorporates recent technological advances in analytical pyrolysis methods especially useful for the characterization of 163 typical synthetic polymers. The book briefly reviews the instrumentation available in advanced analytical pyrolysis, and offers guidance to perform effectually this technique combining with gas chromatography and mass spectrometry. Main contents are comprehensive sample pyrograms, thermograms, identification tables, and representative mass spectra (MS) of pyrolyzates for synthetic polymers. This edition also highlights thermally-assisted hydrolysis and methylation technique effectively applied to 33 basic condensation polymers. - Coverage of Py-GC/MS data of conventional pyrograms and thermograms of basic 163 kinds of synthetic polymers together with MS and retention index data for pyrolyzates, enabling a quick identification - Additional coverage of the pyrograms and their related data for 33 basic condensation polymers obtained by the thermally-assisted hydrolysis and methylation technique - All compiled data measured under the same experimental conditions for pyrolysis, gas chromatography and mass spectrometry to facilitate peak identification - Surveyable instant information on two facing pages dedicated to the whole data of a given polymer sample
Author: Eric Stauffer Publisher: Academic Press ISBN: 0080556264 Category : Law Languages : en Pages : 683
Book Description
The study of fire debris analysis is vital to the function of all fire investigations, and, as such, Fire Debris Analysis is an essential resource for fire investigators. The present methods of analysis include the use of gas chromatography and gas chromatography-mass spectrometry, techniques which are well established and used by crime laboratories throughout the world. However, despite their universality, this is the first comprehensive resource that addresses their application to fire debris analysis.Fire Debris Analysis covers topics such as the physics and chemistry of fire and liquid fuels, the interpretation of data obtained from fire debris, and the future of the subject. Its cutting-edge material and experienced author team distinguishes this book as a quality reference that should be on the shelves of all crime laboratories. - Serves as a comprehensive guide to the science of fire debris analysis - Presents both basic and advanced concepts in an easily readable, logical sequence - Includes a full-color insert with figures that illustrate key concepts discussed in the text
Author: S.C. Moldoveanu Publisher: Elsevier ISBN: 0128235535 Category : Science Languages : en Pages : 642
Book Description
Analytical Pyrolysis of Natural Organic Polymers, Second Edition, Volume 20 describes the methodology of analytical pyrolysis, the results of pyrolysis for a variety of biopolymers, and several practical applications of analytical pyrolysis on natural organic polymers and their composite materials. The book describes the results of pyrolysis for biopolymers and some chemically modified natural organic polymers. In addition, the many applications of analytical pyrolysis are covered in detail, including topics such as polymer detection used in forensic science, structure elucidation of specific polymers, and identification of small molecules present in polymers (anti-oxidants, plasticizers, etc.). - Assembles all essential information on the pyrolysis of natural polymers in one volume, together with the techniques and instrumentation used - Covers advances and developments over the last 20 years, including discussions on the many different types of apparatus commercially available - Includes reference lists in every chapter to guide readers on a path to further study
Author: Yannick Vallee Publisher: CRC Press ISBN: 9789056990817 Category : Science Languages : en Pages : 322
Book Description
Flash Vacuum Thermolysis (FVT) techniques have become well-established methods and occupy an increasingly important place in synthesis. Gas Phase Reactions in Organic Synthesis is a complete review of the applications of flash vacuum thermolysis in organic chemistry; it features new developments in FVT, flow thermolysis and vacuum gas-solid reactions which have appeared in scientific literature since 1980.
Author: Hassan Al- Haj Ibrahim Publisher: BoD – Books on Demand ISBN: 1789840635 Category : Science Languages : en Pages : 124
Book Description
Pyrolysis is an irreversible thermochemical treatment process of materials at elevated temperatures in an inert atmosphere. It is basically a carbonisation process where an organic material is decomposed to produce a solid residue with high (or higher) carbon content and some volatile products. The decomposition reactions are accompanied in general with polymerisation and isomerisation reactions. The end products of pyrolysis can be controlled by optimizing pyrolysis parameters such as temperature and residence time. Pyrolysis is used heavily in the chemical industry to produce many forms of carbon and other chemicals from petroleum, coal, wood, oil shale, biomass or organic waste materials, and it is the basis of several methods for producing fuel from biomass. Pyrolysis also is the process of conversion of buried organic matter into fossil fuels.
Author: Roger Brown
Author: Roger Brown
Author: S.C. Moldoveanu
Author: Serban C. Moldoveanu
Author: Leo Aloysius Wall
Author: Serban C. Moldoveanu
Author: Shin Tsuge
Author: Eric Stauffer
Author: S.C. Moldoveanu
Author: Yannick Vallee
Author: Hassan Al- Haj Ibrahim