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Author: Jean-Maurice Vergnaud
Publisher: Springer Science & Business Media
ISBN: 1447119150
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
The process of cure of thermosets is rather complex, and good knowledge of the various steps and different problems is necessary for the user. For instance, the following basic facts characterise the cure of thermosets: 1. In the same way as rubbers, thermosets are generally polymerised and processed in a simple operation which involves the irreversible transformation of a low molecular weight resin in viscous liquid state into a solid network polymer. The process of cure is thus much more important for thermosets or rubbers than for thermo plastics, because if something goes wrong during the cure process of thermosets, the final products may have undersirable properties and will be of no use or value, while the thermoplastic material can be melted again to make a new material. 2. In contrast with rubbers, a high exothermic cure reaction is the aspect of fundamental importance in the cure process for thermo sets. This high enthalpy of cure associated with a rather low thermal conductivity can give rise to an excessively high tem perature which may cause discoloration and degradation of the material, and also to substantial temperature gradients. The mat erial is thus heterogeneous during the process of cure, and these temperature-time histories in the resin may have some effects on the properties of the final material. 3. Moreover, the increase in production following the reduction in time of the cure cycle necessitates the use of a higher mould temperature.
Author: Jean-Maurice Vergnaud
Publisher: Springer Science & Business Media
ISBN: 1447119150
Category : Technology & Engineering
Languages : en
Pages : 392
Get Book Here
Book Description
The process of cure of thermosets is rather complex, and good knowledge of the various steps and different problems is necessary for the user. For instance, the following basic facts characterise the cure of thermosets: 1. In the same way as rubbers, thermosets are generally polymerised and processed in a simple operation which involves the irreversible transformation of a low molecular weight resin in viscous liquid state into a solid network polymer. The process of cure is thus much more important for thermosets or rubbers than for thermo plastics, because if something goes wrong during the cure process of thermosets, the final products may have undersirable properties and will be of no use or value, while the thermoplastic material can be melted again to make a new material. 2. In contrast with rubbers, a high exothermic cure reaction is the aspect of fundamental importance in the cure process for thermo sets. This high enthalpy of cure associated with a rather low thermal conductivity can give rise to an excessively high tem perature which may cause discoloration and degradation of the material, and also to substantial temperature gradients. The mat erial is thus heterogeneous during the process of cure, and these temperature-time histories in the resin may have some effects on the properties of the final material. 3. Moreover, the increase in production following the reduction in time of the cure cycle necessitates the use of a higher mould temperature.
Author: Jean-Maurice Vergnaud
Publisher:
ISBN: 9781447119166
Category :
Languages : en
Pages : 408
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Book Description
Author: Olga Shepelev
Publisher: Elsevier Inc. Chapters
ISBN: 0128090758
Category : Technology & Engineering
Languages : en
Pages : 143
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Book Description
With recent developments in nanotechnology, thermoset nanocomposites offer numerous advantages compared to conventional composite materials. Moreover, with the emergence of commercial nanomaterials like nanoclays (NCs), carbon nanotubes (CNTs), nanosilica (NS), Polyhedral-Oligomeric-Sil-Sesquioxanes (POSS), tungsten-disulfide (WS2) fullerenes and tubes, and Graphene (Gr), new potential routes have been opened to tailor thermosetting polymers in the nanoscale range. Due to the large surface area of the nanosize particles, only small amounts are needed to cause significant changes in the mechanical, physical, and thermal properties of polymer nanocomposites. When the surface areas of the nanoparticles are modified, additional dimensions for the formulation of structural adhesives and composite matrices arise, and can be used for a variety of applications. The formulation sequence and conditions are found to determine the structure and properties of the resulting nanocomposites. This chapter reviews and analyzes the various thermoset nanocomposites containing: NCs, CNTs, NS, POSS, WS2, and Gr.
Author: Bilen Emek Abali
Publisher: Springer
ISBN: 3030133079
Category : Science
Languages : en
Pages : 586
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Book Description
This book presents a liber amicorum dedicated to Wolfgang H. Müller, and highlights recent advances in Prof. Müller’s major fields of research: continuum mechanics, generalized mechanics, thermodynamics, mechanochemistry, and geomechanics. Over 50 of Prof. Müller’s friends and colleagues contributed to this book, which commemorates his 60th birthday and was published in recognition of his outstanding contributions.
Author: Bryan Ellis
Publisher: Springer Science & Business Media
ISBN: 9401129320
Category : Science
Languages : en
Pages : 325
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Book Description
Epoxy resins have been commercially available for about 45 years and now have many major industrial applications, especially where technical advantages warrant their somewhat higher costs. The chemistry of these resins is fascinating and has attracted study by many very able scientists. The technological applications of the epoxy resins are very demanding and there are many new developments each year. The aims of the present book are to present in a compact form both theoretical and practical information that will assist in the study, research and innovations in the field of epoxy resin science and technology. The literature on epoxy resins is so vast that it is not possible to be encyclopaedic and that is not the function of the present text. It is the editor's hope that the selection of topics discussed will provide an up-to-date survey. There is some overlap in the chapters but this is minimal and so each chapter is essentially self contained. As with all chemicals there are toxicological and other hazards. These are not dealt with in this text since a little knowledge can be dangerous, but material supplied can provide information regarding any safety precautions that may be necessary. However, often these precautions are not onerous and epoxy resins, or more specifically the hardeners, can be handled readily. It is hoped that this text will provide an up-to-date outline of the science and technology of epoxy resins and stimulate further research into unsolved problems and assist further technological developments.
Author: Hatsuo Ishida
Publisher: Elsevier
ISBN: 0444537910
Category : Technology & Engineering
Languages : en
Pages : 709
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Book Description
This handbook provides a wide overview of the field, fundamental understanding of the synthetic methods and structure/property correlation, as well as studies related to applications in a wide range of subjects. The handbook also provides 1H and 13C NMR spectra, FTIR spectra, DSC and TGA thermograms to aid in research activities. Additional tables on key NMR and FTIR frequencies unique to benzoxazine, heat of polymerization, Tg, and char yield will greatly aid in the choice of proper benzoxazine for a specific application. - Provides thorough coverage of the chemistry and applications of benzoxazine resins with an evidence-based approach to enable chemists, engineers and material scientists to evaluate effectiveness - Features spectra, which allow researchers to compare results, avoid repetition and save time as well as tables on key NMR frequency, IR frequency, heat of polymerization, of many benzoxazine resins to aid them in selection of materials - Written by the foremost experts in the field
Author: Jyotishkumar Parameswaranpillai
Publisher: John Wiley & Sons
ISBN: 3527346481
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
State-of-the-art overview on bioepoxy polymers as well as their blends and composites -- covering all aspects from fundamentals to applications! Bioepoxy polymers is an emerging area and have attracted more and more attention due to their biodegradability and good thermo-mechanical performance. In recent years, research progress has been made in synthesis, processing, characterization, and applications of bioepoxy blends and composites. Bioepoxy polymers are very promising candidates to replace the traditional thermosetting nonbiodegradable polymers. Bio-Based Epoxy Polymers, Blends and Composites summaries recent research progress on bioepoxy polymers as well as their blends and composites. It covers aspects from synthesis, processing, various characterization techniques to broad spectrum of applications. It provides a correlation of physical properties with macro, micro and nanostructures of the materials. Moreover, research trends, future directions, and opportunities are also discussed. Attracts attention: Bioepoxy polymers are environmentally friendly and considered as a promising candidate to replace the traditional thermosetting nonbiodegradable polymers Highly application-oriented: Bioepoxy polymers can be used in a broad range of applications such as polymer foams, construction, aerospace, automobiles, self-healing systems One-stop reference: Covers all aspects of bioepoxy polymer, their blends and composites, such as synthesis, properties, processing, characterization and applications Broad audience: Attracts attention from both academia and industry
Author: Jyotishkumar Parameswaranpillai
Publisher: Springer
ISBN: 9783319400419
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
This reference work compiles and summarizes the available information on epoxy blends. It covers all essential areas – the synthesis, processing, characterization and applications of epoxy blends – in a comprehensive manner. The handbook is highly application-oriented and thus serves as a valuable, authoritative reference guide for researchers, engineers, and technologists working on epoxy blends, but also for graduate and postgraduate students, polymer chemists, and faculties at universities and colleges.The handbook is divided into three parts and organized by the types of blends and components: Part I covers epoxy rubber blends, Part II focuses on epoxy thermoplastic blends, and Part III examines epoxy block-copolymer blends. Each part starts with an introduction, and the individual chapters provide readers with comprehensive information on the synthesis and processing, analysis and characterization, properties and applications of the different epoxy blends. All parts conclude with a critical evaluation of the applications, weighing their advantages and drawbacks. Leading international experts from corporate and academic research institutions and universities discuss the correlations of different epoxy blend properties with their macro-, micro- and nanostructures. This handbook thus offers a rich resource for newcomers to the field, and a major reference work for experienced researchers, the first of its kind available on the market. As epoxies find extremely broad applications, e.g. in oil & gas, in the chemical industry, building and construction industry, automotive, aviation and aerospace, boat building and marine applications, in adhesives and coatings, and many more, this handbook addresses researchers and practitioners from all these fields.
Author: J. M. Vergnaud
Publisher: Springer
ISBN: 9780387197081
Category : Chaleur - Conduction - Modèles mathématiques
Languages : en
Pages : 382
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Book Description
Author: Joseph D. Menczel
Publisher: John Wiley & Sons
ISBN: 1118995996
Category : Science
Languages : en
Pages : 607
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Book Description
Presents a solid introduction to thermal analysis, methods, instrumentation, calibration, and application along with the necessary theoretical background. Useful to chemists, physicists, materials scientists, and engineers who are new to thermal analysis techniques, and to existing users of thermal analysis who wish expand their experience to new techniques and applications Topics covered include Differential Scanning Calorimetry and Differential Thermal Analysis (DSC/DTA), Thermogravimetry, Thermomechanical Analysis and Dilatometry, Dynamic Mechanical Analysis, Micro-Thermal Analysis, Hot Stage Microscopy, and Instrumentation. Written by experts in the various areas of thermal analysis Relevant and detailed experiments and examples follow each chapter.
