Teknisk anvendelse af polymerer og kompositter

This book provides the latest developments in functional and engineering materials for defence applications. It contains a total of 20 book chapters in 2 proposed volumes: Vol. 1. Defence Functional Materials and Vol. 2. Defence Engineering Materials. All the book chapters are authored by leading scientists from the premier institutes, such as DRDO laboratory, DMSRDE, Kanpur, India, and edited by Drs. N Eswara Prasad, RJH Wanhill, and DK Setua. Both the authors and the editors are well known internationally for their seminal works in the Functional and Engineering Materials R&D and S&T. The principal purpose of this two-volume book is to provide the salient features of materials selection, synthesis, development and qualification for many a classical applications encompassing aero, naval and ground-based defence systems. They would surely act as valuable vade mecums for both active researchers, defence experts, post-graduate students, and faculty members who like to work and contributeto defence forces through research in areas such as defence materials, products, prototypes, sub-systems and systems that need cutting edge technologies and the latest and best materials and materials solutions.

This book presents the latest developments in the field of vegetable oil -based composites. It focuses on different vegetable oils such as castor, linseed, corn, soybean, olive, palm, and canola oils;, and fillers from inorganic materials and agricultural residues used in the preparation of vegetable oil -based composites. There are several advantages to vegetable oil-based polymer composites, due to their universal availability, inherent biodegradability, low price, and superb environmental credentials (i.e., low eco-toxicity and low toxicity towards humans). This book will be of is of interest to researchers working in the field of bio-based composite materials for the development of green and sustainable materials.

Sensory Polymers: From their Design to Practical Applications discusses recent developments in the field of sensory polymers and showcases the potential applications of these materials in food control and security, civil security, the biomedical field, environmental control and remediation, industrial control of chemicals, and more. Written by worldwide experts in the field, chapters provide in-depth knowledge on several different polymer sensors and their response to different stimuli, which makes this book a valuable resource for researchers and advanced students in polymer science, materials science, and chemistry, as well as those interested on sensing applications and chemical sensory systems, including industry R&D.

This book provides the latest developments in functional and engineering materials for defence applications. It contains a total of 20 book chapters in 2 proposed volumes: Vol. 1. Defence Functional Materials and Vol. 2. Defence Engineering Materials. All the book chapters are authored by leading scientists from the premier institutes, such as DRDO laboratory, DMSRDE, Kanpur, India, and edited by Drs. N Eswara Prasad, RJH Wanhill, and DK Setua. Both the authors and the editors are well known internationally for their seminal works in the Functional and Engineering Materials R&D and S&T. The principal purpose of this two-volume book is to provide the salient features of materials selection, synthesis, development and qualification for many a classical applications encompassing aero, naval and ground-based defence systems. They would surely act as valuable vade mecums for both active researchers, defence experts, post-graduate students, and faculty members who like to work and contribute to defence forces through research in areas such as defence materials, products, prototypes, sub-systems and systems that need cutting edge technologies and the latest and best materials and materials solutions.

This volume presents the recent developments in synthetic biodegradable and biobased polymers. The syntheses of many polymer types such as polyesters and polyamides, and also their processing technologies are discussed herein, and new aspects from fundamental and from industrial research are covered. This combination of both perspectives within this volume will be of interest for many research scientists from academia and industry and also for lectures and teachers. Chapters ''BioPBSTM (Polybutylene succinate)'' and ''Polymer biodegradability 2.0: A holistic view on polymer biodegradation in natural and engineered environments'' are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com. For further details see license information in the chapter.

Additive Manufacturing of Polymer-based Composite Materials: Materials, Processes, and Properties presents the latest developments in additive manufacturing of polymer matrix composites and illustrates the large range of composite materials that can be obtained. Different technologies are presented with their own specificities such as: fused filament fabrication, wet fiber placement, stereolithography, and direct-ink-writing. Composites with chopped or continuous reinforcement, with synthetic or natural fibers, with thermoplastic or thermoset resin are compared and described in detail. Their thermal, physical, electrical, and mechanical properties are discussed.The book is dedicated to professionals involved in engineering design and production, as well as industrial communities who want to gain in-depth knowledge in the field of 3D printed composites.

This book introduces the role of cation¿¿ interactions in chemistry, biology, and polymer materials science. Since the cation¿¿ interaction was defined in 1990, its importance has been recognized in a variety of fields due to its relatively significant interaction energy. A number of examples are introduced in which the contribution of cation-¿ interactions was evidenced by X-ray structures, spectroscopies, computations, and other means. The latest developments in these areas are remarkable; therefore, many recent examples are included.As this book covers the basic aspects of the applications of cation¿¿ interactions it is useful for students and researchers in a wide variety of scientific fields. In addition, the book will not only facilitate understanding of the phenomena occurring in various systems but also provides insights into the design of new catalysts, reactions, and materials.

For 30 years, "Designing Plastic Parts for Assembly" has been the definitive guide for both seasoned part designers and novices to the field, facilitating cost-effective design decisions and ensuring that the plastic parts and products will stand up under use.The detailed yet simplified discussion of material selection, manufacturing techniques, and assembly procedures enables the reader to evaluate plastic materials and design plastic parts with confidence. Good joint design and implementation, the geometry and nature of the component parts, the types of load involved, and other fundamental information necessary for a successful outcome are all included. Throughout, the treatment is practice-oriented and focused on everyday problems and situations.The 10th edition includes an extensive revision of the chapter on welding techniques for plastics, including a new subchapter on hot gas welding. There are also many more minor updates, improvements, and corrections throughout, including numerous new color figures.

This book highlights the latest advances in advanced insulating materials. Energy crisis and environmental pollution are two major themes currently faced by the human society. It is of unprecedented strategic importance to construct a strong smart grid with super/ultra-high voltage network as the backbone and clean energy transmission as the leading force. However, the performance of electrical equipment and devices is greatly determined by the properties of their insulating materials, especially when they have to work in extreme circumstances including high-temperature differences, intense radiation, and strong electric fields. The key advantage of polymers is that their properties could be adjusted by changing their chemical composition and molecular structure. Research on polymer insulating materials has been highly successful as progress has been made in characterizing these properties, designing molecular structures, and studying polymers¿ specialized properties. On the other hand, nanodielectrics are prepared by adding certain nanoscale fillers into a polymer matrix to yield better electrical, thermal, and mechanical properties. When the particle pretreatment methods and the content or category of fillers are adjusted, nanodielectrics tend to have greater breakdown strength as well as better high-temperature resistance and space charge suppression. Therefore, this book covers investigations of properties of insulating materials that explore their interface effects and composite structures and introduces findings in methods that improve the performance of electrical devices. The book is not only used as a timely reference for engineering and technical personnel in related fields but also as a comprehensive textbook for college students.

The book on advanced structured materials is designed to facilitate teaching and informal discussion in a supportive and friendly environment. The book provides a forum for postgraduate students to present their research results and train their presentation and discussion skills. Furthermore, it allows for extensive discussion of current research being conducted in the wider area of advanced structured materials. Doing so, it builds a wider postgraduate community and offers networking opportunities for early career researchers. In addition to focused lectures, the book provides specialized teaching/overview lectures from experienced senior academics. The 2022 Postgraduate Seminar entitled "e;Advanced Structured Materials: Development - Manufacturing - Characterization - Applications"e; was held from February 28th till March 4th, 2022, in Malta. The book that presented postgraduate lectures had a strong focus on polymer mechanics, composite materials, and additive manufacturing.

Covers the chemistry and physics of conjugated polymers, and how they can be designed and optimised for various electronic applications.

This book presents a comprehensive collection of reviews and experimental research findings in the realm of composite materials. It explores manufacturing technologies and applications, as well as recent breakthroughs in nanomaterial-based composites, polymer-based composites, titanium matrix composites (TMCs), conducting polymers, natural polymers, graphene polymers, graphene composites, and organosulfur polymeric composites, alongside reinforced aluminum matrix composites. The mechanical and tribological aspects take center stage, with a focus on aluminum alloy composites as a superior alternative to traditional gear materials. The book also addresses cutting-edge composite materials developed for drug removal via adsorption techniques, radiation shielding, and their use as shielding absorbers for ionizing radiation. Furthermore, the significance of electrical contact materials and their performance is explored. The book unveils fabrication methods, sample preparation techniques, properties, and various applications of these remarkable composites. Topics range from additive manufacturing to solid-phase extraction and solid-phase microextraction utilizing diverse composites as adsorbents. Additionally, the inverse vulcanization process, a novel technique involving the copolymerization of elemental sulfur with different monomers based on their resource origins, is discussed. Technologies such as powder metallurgy (PM), mechanical alloying (MA), self-propagating high-temperature synthesis (SHS), and rapid solidification processing (RSP) are described. The book further delves into the preparation techniques of zeolite using both conventional and advanced methods, along with the synthesis of various zeolite-based composites, particularly their application in environmental remediation. The book culminates with a summary of analysis and modeling techniques used in composite materials, including those employed in ballistic applications.

This book introduces the approach of Machine Learning (ML) based predictive models in the design of composite materials to achieve the required properties for certain applications. ML can learn from existing experimental data obtained from very limited number of experiments and subsequently can be trained to find solutions of the complex non-linear, multi-dimensional functional relationships without any prior assumptions about their nature. In this case the ML models can learn from existing experimental data obtained from (1) composite design based on various properties of the matrix material and fillers/reinforcements (2) material processing during fabrication (3) property relationships. Modelling of these relationships using ML methods significantly reduce the experimental work involved in designing new composites, and therefore offer a new avenue for material design and properties. The book caters to students, academics and researchers who are interested in the field of material composite modelling and design.

Non-halogenated Flame-Retardant Technology for Epoxy Resins, Thermosets and Composites provides a comprehensive and up-to-date review of the latest advances and technological developments in the field. Chapters cover important flame-retardant systems based on phosphorus, nitrogen, silicon, and boron as well as novel flame retardant epoxy nanocomposites such as graphene, graphitic carbon nitride, MoS2, phosphorene, CNTs, LDHs, and POSS. The use of flame retardant epoxy thermosets and composites in varying applications are also covered, for example, in coatings and paints, in electric and electronic applications, and in aviation and automotive sectors. This comprehensive book will be an essential reference resource for academic and industrial researchers as well as materials scientists and polymer engineers. It will also be ideal for anyone working in the development of flame retardant epoxy-based materials.

Non-Destructive Testing of Impact Damage in Fiber-Reinforced Polymer Composites: Fundamentals and Applications provides detailed knowledge on the fundamentals and applications of frequently used NDT techniques used to assess impact damage in composite structures. The book starts with a detailed introduction to impact damage in composite structures. Then, based on the nature, capabilities, and limitations of different NDT techniques, the book is divided into six different parts, including vision-based, acoustic-based, radiation-based, laser-based, and electric-based methods, fiber optics are also covered in detail. Each section also includes subsections discussing the different techniques used in each category. The book is complemented at the end with a section dedicated to future trends in non-destructive evaluation of impact damage in composite materials. A useful reference for both academic and industrial researchers, the book covers the fundamentals, practical tips, and applications, as well as current research trends and future possibilities for each technique.

Biotechnological Production of Bioactive Phytochemicals of Medicinal Value: A Comprehensive Treatise covers a broad variety of methods for secondary metabolites production (both pharmaceuticals and cosmeceuticals), compiling state-of-the-art material about the current knowledge of in vitro production for a large number of bioactive phytochemicals. Plants are a source of bioactive compounds and specialty chemicals such as ginsenosides; paclitaxel, artemisinin, veregen and nutraceuticals. Biopharmaceuticals are important in human healthcare, and herbal actives are gaining importance all over the world. With natural resources dwindling, in vitro production of secondary compounds on a commercial scale is being more and more required. Besides providing an alternative technology to bypass difficulties, the plant tissue culture (used in a broad sense to include cell, tissue, and organ culture) offers many advantages. In vitro technology also facilitates novel means of conserving the genetic diversity of the germplasm of medicinal plants through cryopreservation, production of novel compounds through biotransformation, somatic hybridization, and selective gene transfer through recombinant DNA technology for enhancing metabolite production.

Synthetic and Mineral Fibers, Their Composites and Applications reviews recent advances and technological developments in this important research field. The book provides an up-to-date record of significant research findings and observations along with an update on current and future potential applications. The book provides vital information on recent advancements, modern processing technologies, manufacturing, and applications and summarizes lifecycle and performance parameters for these types of composites. This book will be a valuable reference resource for academic and industrial researchers and materials scientists and engineers working in the development of polymer composite materials reinforced with synthetic and mineral fibers for applications in aerospace, medical, defense, automotive and construction sectors.

This book presents the selected papers presented at the 2nd World Conference on Byproducts of Palms and their Applications (ByPalma 2021), held as a virtual conference on September 28-30, 2021. The conference focused on the byproducts of palm plantations around the globe and their current and potential applications. It provided an interdisciplinary platform for leading academic scientists, researchers, artisans, entrepreneurs and industry professionals as well as palm growers to exchange recent developments, technologies, innovations, trends, concerns, challenges, and opportunities, related to palm by-products R&D, manufacturing, and crafts. As a reference, it will be of interest to students, scientists, engineers, government officials, and industrial practitioners.

This book provides insight into the underlying basic theories and concepts in X-ray, light, and neutron scattering. The three scattering principles are systematically presented, together with a unified description based on elastic scattering of electromagnetic waves and the Schrodinger wave from matter. These explanations are presented with an introduction of their common Born approximation using a consistent set of symbols and terminology and with step-by-step derivations of equations.  This book emphasizes the combined applications of these three scattering methods, wherever and whenever possible, as a very powerful methodology for characterization of internal structures of soft matters in the length scale ranging from subnanometers to a few 10 micron meters. These applications include explorations for evolution of hierarchically self-organized internal structures of a variety of soft matters, including cells, under diverse environmental conditions.This book will not only be an excellent resource for graduate students and academic researchers who analyze structures of soft matters and polymers, but it will also be useful for researchers in industries.

This edited collection deals with the structure-property relationships and biomedical applications of carboxymethyl chitosan derivatives in different fields. Readers will detailed overview of the preparatory methods involved in the derivatives of carboxymethyl chitosan and its interaction with metal ions.The chapters provide a detailed overview of the different types of carboxymethyl chitosan derivatives, including the preparatory methods involved, the interactions with metal ions, and the antimicrobial activities. These different forms of carboxymethyl chitosan derivatives are found to be potentially used in food packaging, in enhancing saltiness, as biosensors, and also as wound dressing. Chapters are also devoted to the fabrication and biomedical applications of carboxymethyl chitosan derivatives-based nanofibers as well as the interaction of carboxymethyl chitosan with blood in blood clotting and the underlying mechanism. Contributing authors additionally explore topicsrelated to carboxymethyl chitosan-based hydrogels, films, scaffolds, fibers, and composites. Finally, this volume presents the current challenges in developing biomedical products based on carboxymethyl chitosan derivatives. This book will be of interest not only to chemists, but to all scientists working in the fields of material/environmental science, biological science, and biomaterials. These chapters are great resources for any researcher who works with structure-property relationships, biological interactions, and the applications of carboxymethyl chitosan derivatives in different biomedical fields.

This book provides the background needed to understand not only the wide field of polymer processing, but also the emerging technologies associated with the plastics industry in the 21st century. It combines practical engineering concepts with modeling of realistic polymer processes. Divided into three sections, it provides the reader with a solid knowledge base in polymer materials, polymer processing, and modeling."Understanding Polymer Processing" is intended for the person who is entering the plastics manufacturing industry and as a textbook for students taking an introductory course in polymer processing. It also serves as a guide to the practicing engineer when choosing a process, determining important parameters and factors during the early stages of process design, and when optimizing such a process. Practical examples illustrating basic concepts are presented throughout the book.New in the third edition are chapters on data-driven modeling and physics-driven modeling, as well as new sections on manufacturing and dimentional analysis. In addition to a number of other smaller improvements and corrections throughout the book, bonus code downloads are also providided. Contents: Part I: Polymeric MaterialsThis section gives a general introduction to polymers, including mechanical behavior of polymers and melt rheology.Part II: Polymer ProcessingThe major polymer processes are introduced in this section, including extrusion, mixing, injection molding, thermoforming, blow molding, film blowing, and many others.Part III: ModelingThis last section delivers the tools to allow the engineer to solve back-of-the-envelope polymer processing models. It includes dimensional analysis and scaling, transport phenomena in polymer processing, and modeling polymer processes.

This easy-to-understand guide provides the necessary information to implement a scientific molding program. It is a hands-on reference for people on the molding floor, including those previously lacking theoretical background or formal education.The book covers how the injection molding machine prepares the plastic and understanding of plastic flow. The functions of the main machine components are explained and understanding of correct procedures and testing is developed. Each step of the process is clearly explained in a step-by-step manner, and simple examples of important calculations are provided. The practical approach is augmented by useful guides for troubleshooting and machine set-up. The 2nd edition has a new chapter covering the effects of making specific changes to the process, as well as a number of other improvements throughout. Bonus download included: Excel spreadsheet with tests for process and machine performance.Contents1. Injection Unit: Screw2. Injection Unit: Barrel3. Clamping Unit4. Ejectors/Controllers, Human Machine Interface (HMI)5. Machine Performance Testing6. Process Development Test7. Plastic Temperature8. Plastic Flow9. Plastic Pressure (Pack/Hold)10. Cooling11. Benchmarking the Injection Molding Process12. Process Troubleshooting13. What is Important on a Set-Up Sheet?14. Commonly Used Conversion Factors and Formulas15. Machine Set-Up16. Things That Hurt the Bottom Line of a Company17. Terms and Definitions

This book presents an in-depth exploration of complex metal oxides, focusing on their applications in photocatalysis and biomedical materials. It highlights the practical importance of complex metal oxides, which have gained significant attention in recent years due to their diverse range of properties. The book specifically delves into the most representative series of compounds based on stable structural types of minerals, such as perovskite, fluorite, pyrochlore, corundum, and rutile. It also emphasizes the scientific interest in the pyrochlore mineral structure, which has been shown to exhibit photocatalytic activity.Recent studies have revealed that some compounds with the pyrochlore structure can act as promising candidates for photocatalysis. Additionally, the book highlights the use of photocatalysis in producing biomedical materials based on natural polymers. These materials possess a unique combination of components assembled in a specific structure, which makes them highly attractive for regenerative medicine associated with cell/tissue regeneration stimulation. Overall, this book offers a comprehensive analysis of the potential of complex metal oxides, particularly those with the pyrochlore structure, and is particularly useful for those researchers working in the fields of green chemistry and biomedical materials science.

Mechanics of Composite, Hybrid, and Multifunctional Materials, Volume 5 of the Proceedings of the 2022 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the fifth volume of six from the Conference, brings together contributions to this important area of research and engineering.  The collection presents early findings and case studies on a wide range of areas, including:Recycled Constituent CompositesDamage DetectionAdvanced Imaging of CompositesMultifunctional MaterialsComposite InterfacesTunable Composites  

Natural fiber composites are a preferred alternative to conventional composites due to their environment-friendly nature. However, their market share is limited due to: a) limited number and quantities of natural fibers available for composites, b) diversity in fibers structure, c) poor mechanical properties of fibers as well as composites, d) susceptibility to microbial attacks, and e) cellulose degradation temperature around 200 deg C, which hinders the development of natural fiber reinforced thermoplastic composites using thermoforming at high temperatures. A number of researchers have contributed to the solution of the problem of poor mechanical properties and issues related to fabrication during the last decade. This book covers these different solutions. The book is divided into two principal themes: a) structure-property relationship: fibers to composites-it includes the discussion on fibers, their surface modifications, variation in the structure of reinforcement, and approaches for the enhancement of properties. b) Fabrication process of composites-it includes the novel approaches used for the development of natural fiber composites using the commingling technique for thermoplastic composites.

This book discusses the diverse array of particles that are found in coatings from both a physical and a performance standpoint.  It also describes the fundamentals of particle behavior and shows how these affect the performance and properties of their end-use applications. It consists of nineteen chapters, demonstrating the wide range of types of particles found in coatings as well as the diversity of the important attributes they hold. The authors also present a forward looking view of current issues and trends in the coatings industry.  In addition, a chapter on the use of particles in paper laminate, a closely aligned field, is included.  This book is of interest to formulators of any type of coatings as well as researchers in aligned fields that use high volumes of small particles, such as the plastics and paper industries.

This text- and workbook provides a clearly written, comprehensive introduction to the major topics associated with plastics technology, from basic chemistry and processing methods to the problem of waste and the issue of recycling plastics. Guiding questions at the beginning of each lesson help the reader to work through the material in a targeted manner; success checks at the end of each lesson enable the reader to review what he/she has learned. It thus facilitates independent, self-paced learning, meeting the requirements of modern vocational training.

This book provides a general overview of the importance of fibre-matrix interfacial bonding characteristics in natural fibre-based composites to obtain optimal material properties for a specific application. Composites materials are prepared by combining fibres and polymers to achieve superior materials properties than those of the individual components. Composite materials are used to produce lightweight components with increased stiffness and strength; their properties can also be tailored for any specific applications. The glass fibre reinforced composites dominate 95% of the thermoplastic and thermoset-based composites. However, the natural fibre reinforced composites can give competition to the glass fibres due to their advantages such as biodegradability, low density, low cost, and good mechanical properties. This book looks into biocomposites and its important aspect of optimization of materials¿ performance by fine-tuning the fibre-matrix bonding characteristics. The chapters in the book look at different plant fibres such as kenaf, pineapple leaf, jute, date palm, luffa, cotton, hemp, wood, bamboo, flax, and straw and the different approaches to enhance the fibre-matrix interfacial bonding through physical and/or chemical treatment methods. It demonstrates that the nature of fibre-matrix bonding has a significant effect on the properties such as tensile, flexural, impact, inter-laminar shear strength, moisture absorption, thickness swelling, thermal, chemical, damping, creep, and fatigue. Its content appeals to academics, students, researcher, and scientist who are working in the field to produce biodegradable and recyclable materials in the composite industry.

This book introduces the MagLev testing method for density measurement and density-based applications of diamagnetic and low-magnetic objects using permanent magnets. The book surveys the most relevant papers on the theory and model of various MagLev methods that have become the foundation to elucidate the principles of MagLev and the conditions for stable levitation. A thorough summary of the improvements demonstrates the applications and potential of the MagLev method in many fields. This book is separated into 11 chapters to present MagLev testing method fully, including a review of the background of MagLev, theories and basic principles of the stable levitation of object, different dimensions of applications of MagLev in the fields of mechanical engineering, chemistry, and bioengineering, and sophisticated applications of manipulation and separation. This book would benefit the audience in the field of mechanical engineering, chemistry, materials science,and bioengineering, since magnetic levitation method has proved itself suitable for the density-based analysis and applications of materials of different scales. The analysis in this book will help the audience deeply understand the mechanism of magnetic levitation, and it can serve as an instruction for the magnetic levitation procedure, or guidebook for the magnetic levitation setup. With the viewpoints and thoughts about MagLev running through this book, this book may spark the audience¿s interest towards magnetic levitation method, and enlighten them to further develop Maglev method.