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Author : J.V. Dawkins
Publisher : Springer
Page : 0 pages
File Size : 44,7 Mb
Release : 1982-06-30
Category : Technology & Engineering
ISBN : 0853341192
Author : J. V. Dawkins
Publisher : Springer Science & Business Media
Page : 364 pages
File Size : 48,6 Mb
Release : 1978
Category : Polymerization
ISBN : 0853344019
Author : J.V. Dawkins
Publisher : Springer
Page : 268 pages
File Size : 44,7 Mb
Release : 2011-10-12
Category : Technology & Engineering
ISBN : 940096630X
This volume includes reviews on tackling polymer characterisation problems and on developing specific characterisation techniques. The first two chapters and the last chapter describe progress in providing character isation information for polymers containing long-chain branching, for polymer blends, and for polymers having preferred orientation. The remaining chapters review progress in individual techniques, showing with examples the characterisation results which may be obtained. It is recognised that the degree of chain branching which can evolve in some polymerisation processes can have a marked effect on the flow properties of a polymer, and therefore on polymer processing behaviour. In the first chapter the characterisation of long-chain branching from measurements of the molecular size and molar mass of a polymer in dilute solution is outlined. It is indicated that a complete characterisation of branching requires the combined use of several techniques, emphasising in particular recent developments involving gel permeation chromatography. Thermal analysis and infrared spectroscopy are widely used techniques in polymer characterisation. Both techniques can provide, very quickly, significant results with readily available instrumentation. This is illustrated by the review of the characterisation of polymer blends by thermal analysis in Chapter 2. An assessment of blend morphology, which influences the behaviour of a material consisting of two or more polymers, is presented in terms of transition temperatures. Conventional infrared spectroscopy involves dispersive spectrometers which do not always provide accurate information on composition and structure for complex polymeric materials.
Author : J. V. Dawkins
Publisher : Unknown
Page : 0 pages
File Size : 49,7 Mb
Release : 1982
Category : Electronic
ISBN : OCLC:630880552
Author : J. V. Dawkins
Publisher : Unknown
Page : 128 pages
File Size : 54,8 Mb
Release : 1986
Category : Electronic
ISBN : OCLC:37236114
Author : B.J. Hunt,M.I. James
Publisher : Springer Science & Business Media
Page : 376 pages
File Size : 47,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401121606
Polymers continue to play an ever increasing role in the modern world. In fact it is quite inconceivable to most people that we could ever have existed of the increased volume and variety of materials without them. As a result currently available, and the diversity of their application, characterisation has become an essential requirement of industrial and academic laboratories in volved with polymeric materials. On the one hand requirements may come from polymer specialists involved in the design and synthesis of new materials who require a detailed understanding of the relationship between the precise molecular architecture and the properties of the polymer in order to improve its capabilities and range of applications. On the other hand, many analysts who are not polymer specialists are faced with the problems of analysing and testing a wide range of polymeric materials for quality control or material specification purposes. We hope this book will be a useful reference for all scientists and techno or industrial laboratories, logists involved with polymers, whether in academic and irrespective of their scientific discipline. We have attempted to include in one volume all of the most important techniques. Obviously it is not possible to do this in any great depth but we have encouraged the use of specific examples to illustrate the range of possibilities. In addition numerous references are given to more detailed texts on specific subjects, to direct the reader where appropriate. The book is divided into II chapters.
Author : P. M. Visakh,Gordana Markovic,Daniel Pasquini
Publisher : Woodhead Publishing
Page : 342 pages
File Size : 41,5 Mb
Release : 2016-08-24
Category : Technology & Engineering
ISBN : 9780081004272
Recent Developments in Polymer Macro, Micro and Nano Blends: Preparation and Characterisation discusses the various types of techniques that are currently used for the characterization of polymer-based macro, micro, and nano blends. It summarizes recent technical research accomplishments, emphasizing a broad range of characterization methods. In addition, the book discusses preparation methods and applications for various types of polymer-based macro, micro, and nano blends. Chapters include thermoplastic-based polymer & nano blends, applications of rubber based and thermoplastic blends, micro/nanostructures polymer blends containing block copolymers, advances in polymer-inorganic hybrids as membrane materials, synthesis of polymer/inorganic hybrids through heterophase polymerizations, nanoporous polymer foams from nanostructured polymer blends, and natural polymeric biodegradable nano blends for protein delivery. Describes the techniques pertaining to a kind (or small number) of blends, showing specific examples of their applications Covers micro, macro, and nano polymer blends Contains contributions from leading experts in the field
Author : J.V. Dawkins
Publisher : Springer Science & Business Media
Page : 275 pages
File Size : 55,5 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9789400966284
This volume includes reviews on tackling polymer characterisation problems and on developing specific characterisation techniques. The first two chapters and the last chapter describe progress in providing character isation information for polymers containing long-chain branching, for polymer blends, and for polymers having preferred orientation. The remaining chapters review progress in individual techniques, showing with examples the characterisation results which may be obtained. It is recognised that the degree of chain branching which can evolve in some polymerisation processes can have a marked effect on the flow properties of a polymer, and therefore on polymer processing behaviour. In the first chapter the characterisation of long-chain branching from measurements of the molecular size and molar mass of a polymer in dilute solution is outlined. It is indicated that a complete characterisation of branching requires the combined use of several techniques, emphasising in particular recent developments involving gel permeation chromatography. Thermal analysis and infrared spectroscopy are widely used techniques in polymer characterisation. Both techniques can provide, very quickly, significant results with readily available instrumentation. This is illustrated by the review of the characterisation of polymer blends by thermal analysis in Chapter 2. An assessment of blend morphology, which influences the behaviour of a material consisting of two or more polymers, is presented in terms of transition temperatures. Conventional infrared spectroscopy involves dispersive spectrometers which do not always provide accurate information on composition and structure for complex polymeric materials.
Author : J. V. Dawkins
Publisher : Unknown
Page : 283 pages
File Size : 48,5 Mb
Release : 1978
Category : Polymers
ISBN : OCLC:630880530
Author : Anonim
Publisher : iSmithers Rapra Publishing
Page : 78 pages
File Size : 40,7 Mb
Release : 1999-12
Category : Gel permeation chromatography
ISBN : 1859571735
Author : J V Dawkins
Publisher : Springer
Page : 256 pages
File Size : 54,7 Mb
Release : 2014-01-15
Category : Electronic
ISBN : 9401092389
Author : J.V. Dawkins
Publisher : Springer
Page : 343 pages
File Size : 40,8 Mb
Release : 1986-04-30
Category : Technology & Engineering
ISBN : 0853344019
The policy adopted in Volume 1 of this series of including a relatively small number of topics for detailed review has been continued here. The techniques selected have received considerable attention in recent years. F or this reason and because of the significance of the characterisation data, further coverage of 13C nuclear magnetic resonance spectroscopy and small angle neutron scattering is given in the first two chapters. In Chapter I a large part of the review describes the determination of monomer sequence distributions and configurational sequences in copolymers formed from more than one polymerisable monomer. The review on neutron scattering (Chapter 2) is directed towards the determination of the chain conformation in semi-crystaIIine polymers, which has provided important results for the interpretation of chain folding and morphology in crystaIIisable polymers. Laser Raman spectroscopy has also been used for morphological studies, and this application together with a description of the theoretical and experimental aspects of the technique is given in Chapter 3. X-ray photoelectron spectroscopy because of its extreme sensitivity to surface characteristics has provided information on polymeric solids that could not be obtained by other techniques. The principles and practice of this ESCA technique, including its use for simple elemental analysis, structural elucidation and depth profiling, are described in Chapter 4. The final two chapters are mainly concerned with the chain conformation of polymers in dilute solution. Ultrasonic techniques (Chapter 5) show pmmise for observing the dynamics of conformational changes.
Author : Rongchun Zhang,Toshikazu Miyoshi,Pingchuan Sun
Publisher : Royal Society of Chemistry
Page : 590 pages
File Size : 41,7 Mb
Release : 2019-07-29
Category : Science
ISBN : 9781788018630
Since the introduction of FT-NMR spectroscopy around five decades ago, NMR has achieved significant advances in hardware and methodologies, accompanied with the enhancement of spectral resolution and signal sensitivity. Rapid developments in the polymers field mean that accurate and quantitative characterization of polymer structures and dynamics is the keystone for precisely regulating and controlling the physical and chemical properties of the polymer. This book specifically focuses on NMR investigation of complex polymers for the polymer community as well as NMR spectroscopists, and will push the development of both fields. It covers the latest advances, for example high field DNP and ultrafast MAS methodologies, and show how these novel NMR methods characterize various synthetic and natural polymers.
Author : W.M. Groenewoud
Publisher : Elsevier
Page : 407 pages
File Size : 49,5 Mb
Release : 2001-05-21
Category : Technology & Engineering
ISBN : 9780080528939
Thermal Analysis (TA) has become an indispensable family of analytical techniques in the polymer research. The increased importance of these techniques can be seen as the result of three more or less parallel developments:• a tempestuous development of TA measuring techniques in combination with a high degree of automation,• the strongly increased understanding of the underlaying theory and,• the increasing knowledge of the relation between the polymers' chemical structure and their physical properties. These areas are still in their developmental stages, especially the third area. The increasing knowledge of the dependence of physical properties on chemical structure just accentuated more and more the need for accurate thermoanalytical measurements, and this knowledge is very important for the first stages of the development of new polymeric systems. Besides, the contribution of TA remains necessary for the technical and commercial development of such a new polymer system. The use of the various TA techniques in these processes is described in this book in nine chapters, while chapter ten illustrates the information obtained about different polymers during special case studies. This book illustrates in this way, applications of a wide variety of TA techniques whilst it is written from a materials characterisation rather than from a TA point of view with attention being paid to the chemical structure/physical properties correlations.
Author : Richard E. Mark,Charles Habeger,Jens Borch,M. Bruce Lyne
Publisher : CRC Press
Page : 1040 pages
File Size : 52,7 Mb
Release : 2001-09-27
Category : Science
ISBN : 9781482290103
Contains basic principles and the latest techniques in paper and paperboard testing. Fosters an understanding of theory and mechanical testing parameters to evaluate results and make improvements. Emphasizes new procedures utilizing advanced microscopy equipment.
