Teknisk anvendelse af polymerer og kompositter

This book covers topics related to structural composite materials such as processing, characterization, applications and challenges. The book presents ways of processing composites, where different types of composites can be processed depending on the type of reinforcement and matrix. It also outlines the evaluation of mechanical properties of a few processed composites and discusses the potential applications of composites and machining challenges faced in processing polymer and ceramic composites. The book caters to material scientists, industrial practitioners, researchers and students working on structural composite materials.

This book in the advanced structured materials series provides first an introduction to the mircomechanics of fiber-reinforced laminae, which deals with the prediction of the macroscopic mechanical lamina properties based on the mechanical properties of the constituents, i.e., fibers and matrix. Composite materials, especially fiber-reinforced composites, are gaining increasing importance since they can overcome the limits of many structures based on classical metals. Particularly, the combination of a matrix with fibers provides far better properties than the constituents alone. Despite their importance, many engineering degree programs do not treat the mechanical behavior of this class of advanced structured materials in detail, at least on the bachelor¿s degree level. Thus, some engineers are not able to thoroughly apply and introduce these modern engineering materials in their design process. The second part of this book provides a systematic and thorough introduction to the classical laminate theory based on the theory for plane elasticity elements and classical (shear-rigid) plate elements. The focus is on unidirectional lamina which can be described based on orthotropic constitutive equations and their composition to layered laminates. In addition to the elastic behavior, failure is investigated based on the maximum stress, maximum strain, Tsai-Hill, and the Tsai-Wu criteria. The introduced classical laminate theory provides a simplified stress analysis, and a subsequent failure analysis, without the solution of the system of coupled differential equations for the unknown displacements in the three coordinate directions. The book concludes with a short introduction to a calculation program, the so-called Composite Laminate Analysis Tool (CLAT), which allows the application of the classical laminate based on a sophisticated Python script.

Technical Organic and Inorganic Fibres from Natural Resources focuses on recent advances in the synthesis, processing, characterization, and application of non-textile fibers. The book provides a general introduction to the uses of natural fibers in technical textile applications while also reviewing the latest technical methods for producing these high-performance materials. As the textile industry is focused on finding alternative green fibers with the aim of providing high quality products which are fully recyclable and biodegradable, natural fibers from renewable sources play an increasingly important role in the industry due to their unique properties and functionality.

This proceedings book contains papers presented at the International Symposium on Lightweight and Sustainable Polymeric Materials (LSPM23) held on February 17, 2023, and organized by King Mongkut¿s University of Technology North Bangkok, Thailand. The papers in this book are presented by academics and industrial practitioners showcasing the latest technological advancements and applications of environmentally friendly polymeric materials with the emphasis on the production of lightweight, low-cost, low-energy-consuming materials with competitive performance. The content of this book appeals to academia and industrial researchers from the fields of polymer chemistry, physics, and materials science.

This book comprehensively reviews the key topics in the area of nanocomposites and hybrid materials used for waste water treatment and purification. It covers materials chemistry, various synthesis approaches and properties of these nanomaterials for the different water purification techniques.  It provides new direction to the readers to better understand the chemistry behind these materials and the methods to improve their properties. This book will be a very valuable reference source for graduates and postgraduates, engineers, research scholars (primarily in the field of material science, water, nanoscience and nanotechnology), material scientists, researchers in the water-related area, scientists working in water treatment plans and pollution mitigation industries. 

This book summarizes many of the recent advances in the design and application of thin-walled composite protective structures. The past few decades have seen outstanding advances in the use of composite materials in structural applications. Composites have revolutionized traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. This book presents an extensive survey on recent improvements in the research and development of composites and biocomposites that are used to make structures in various applications. This book deals with design, research and development studies, experimental investigations, theoretical analysis, and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures. This book also focuses the recent advances in biocomposite materials from renewableresources and introduces a potential application of this material. The content is this book benefits the academics, researchers, scientists, engineers, and students in the field of epoxy blends for application as lightweight advanced composite structures.

This book focuses on the modern development of techniques for analysis of the hierarchical structure of polymers from both the experimental and theoretical points of view. Starting with molecular and crystal symmetry, the author explains fundamental and professional methods, such as wide- and small-angle X-ray scattering, neutron diffraction, electron diffraction, FTIR and Raman spectroscopy, NMR, and synchrotron radiation. In addition, the author explains another indispensable method, computer simulation, which includes energy calculation, lattice dynamics, molecular dynamics, and quantum chemistry. These various methods are described in a systematic way so that the reader can utilize them for the purpose of 3D structure analysis of polymers. Not only such analytical knowledge but also the preparation techniques of samples necessary for these measurements and the methods of analyzing the experimental data collected in this way are given in a concrete manner. Examples are offered to help master the principles of how to clarify the static structures and dynamic structural changes in the phase transitions of various kinds of crystalline polymers that are revealed by these novel methods. The examples are quite useful for readers who want to apply these techniques in finding practical solutions to concrete problems that are encountered in their own research. The principal audience for this book is made up of young professional researchers including those working in industry, but it can also be used as an excellent reference for graduate-level students.This book is the first volume of a two-volume set with Structural Science of Crystalline Polymers: A Microscopically Viewed Structure-Property Relationship being the second volume by the same author.

The book discusses the commercial applications of biochar and its composites. Biochar prepared from pyrolysis of waste biomass is gaining widespread attention in environmental remediation due to its multifaceted benefits. This book explores these possible applications of biochar in water treatment and removal of pollutants from the contaminated sites. It also emphasizes the role of biochar engineering through different physical and chemical methods to enhance structural and physicochemical properties of biochar such as surface area, porosity and surface functional group. It also focuses on the diverse source of biomass that can be used for biochar production, different methodologies for biochar preparation and biochar engineering for improvement of its properties. Finally, it describes all the applications of biochar that can contribute to environmental remediation and sustainability. Given the contents, the book will be useful for students, researchers and professionals in the area ofenvironmental chemistry and material science.

This book is an introductory text for graduate students, researchers in industries, and those who are just beginning to work on organic electronics materials, devices and their applications. The book includes mainly fundamental principles and theories for understanding organic electronics materials and devices, but also provides information about state-of-the-art technologies, applications and future prospects. These topics encompass physics for organic transistors, structure control technologies of polymer semiconductors, nanomaterials electronics, organic solar cells, organic electroluminescence and dynamics for excitation, among others. In this second edition, the topics that have had particular progress in the field of organic electronics over the past seven years were added. For example, Thermally Activated Delayed Fluorescence (TADF) technology for organic LED, the development of perovskite materials, light-emitting materials using nanomaterials and the development of skin sensors and wearable/embedded devices. The recent scientific understanding of organic electronics is also introduced. This book will help readers to be able to contribute to society with the technologies and science of organic electronics materials in the future.

This book introduces the different advanced hybrid composite materials used in aerospace, automotive, marine, and general engineering infrastructures. It represents the current development processes and applications in aircraft, automobile, and marine structures. This book also contains test cases and their validation using a finite element approach using computer tools. The book also deals with the design approach for innovative hybrid composite materials focused on diverse engineering and non-engineering applications. A detailed review of the state-of-the-art composite materials study presented here would be of interest to scientists, academics, students, and engineers and professionals in general working in the field of advanced composite materials and structures. This book is also useful for Ph.D. research scholars to improve their fundamental understanding of advanced materials and is also suitable for master¿s and undergraduate courses on composite materials.

This book first provides a systematic and thorough introduction to the classical laminate theory for composite materials based on the theory for plane elasticity elements and classical (shear-rigid) plate elements. The focus is on unidirectional lamina which can be described based on orthotropic constitutive equations and their composition to layered laminates. In addition to the elastic behavior, failure is investigated based on the maximum stress, maximum strain, Tsai-Hill, and the Tsai-Wu criteria.The solution of the fundamental equations of the classical laminate theory is connected with extensive matrix operations, and many problems require in addition iteration loops. Thus, a classical hand calculation of related problems is extremely time consuming. In order to facilitate the application of the classical laminate theory, we decided to provide a Python-based computational tool, the so-called Composite Laminate Analysis Tool (CLAT) to easily solve somestandard questions from the context of fiber-reinforced composites. The tool runs in any standard web browser and offers a user-friendly interface with many post-processing options. The functionality comprises stress and strain analysis of lamina and laminates, derivation of off-axis elastic properties of lamina, and the failure analysis based on different criteria.

How long have composites been around? Where does the classical laminate theory come from? Who made the first modern fiber composite? This work in the history of materials science is the first examination of the strategies employed in the nineteenth and twentieth centuries in researching and developing hybrid materials. The author analyzes numerous sources which record a regular back and forth between applied design and exploratory materials engineering in building such ¿modular materials¿. The motivations, ideas, and concepts of engineers, scientists, and other players in industry and research are also examined within the context of their day. This book presents the development and importance of composite materials within historical context.The content includesEarly composite materialsThe development of composite materials in the industrial nineteenth centuryComposites in twentieth-century polymer chemistryThe development of hybrid material systems in the second half of the twentieth centurySummary.The author:Dr. Andreas T. Haka is an engineer and historian of science and technology. He is currently a lecturer in the Section for the History of Science and Technology at the University of Stuttgart. His main focus is on the history and practice of materials research, raw materials, materials science and technological constructive design, scientific networks, and research technologies.

This book presents an overview of polymer nanocomposites for use in various high-temperature applications. Specifically, it focuses on the structure and physical properties of nanocomposites based on heterocyclic matrices derived from nitrile monomers such as cyanate esters or phthalonitriles. Due to increasing interest in new heat-resistant, lightweight materials for use in extreme conditions, such as in aeronautics, microelectronics, and various industrial machinery, the high thermal stability of heterocyclic polymer networks, in particular, has attracted much attention from materials researchers and engineers. Featuring a comprehensive review of the most recent advances in research on the structure and physical properties of these promising high-temperature polymer nanocomposites, this book will be of particular interest to materials scientists and engineers working throughout the fields of aeronautical and microelectronic engineering. In general, this book is intended for use by researchers of composite materials and specialists engaged in material selection for work in extreme conditions; for students specializing in materials science; for polymer physicists, and for university libraries.

This book presents the findings of a major research program investigating structural design and controllable preparation of function-directed crystalline materials. The program was launched by the National Natural Science Foundation of China during the 11th Five-Year Plan period, which was started in October 2008 and concluded at the end of 2016. This book first summarizes the overall scientific objectives and the current state of the art of crystalline materials research in China and the international frontier. It also focuses on exploring the relationships between structures, compositions, and properties of crystalline materials and proposes new mechanisms and models for new materials exploration. In addition, it introduces a new functional-motif theory that can guide the development of crystalline materials with optical, electrical, and other composite functions and presents new research methods for the controlled synthesis and assembly of crystalline materials, and detection and characterization of functional motifs. Furthermore, practical applications for materials such as photoelectric conversion materials, nonlinear optical materials, laser and fluorescent crystal materials, and ferroelectric and microwave dielectric materials have been described. Given its scope, this book is of interest to researchers who work in crystalline materials. It also promotes the multidisciplinary collaboration among chemistry, materials science, and physics.

Structural Health Monitoring/Management (SHM) in Aerospace Structures provides readers with the spectacular progress that has taken place over the last twenty years with respect to the area of Structural Health Monitoring (SHM) Management. The SHM field encompasses transdisciplinary areas, including smart materials, sensors and actuators, damage diagnosis and prognosis, signal and image processing algorithms, wireless intelligent sensing, data fusion, and energy harvesting. This book focuses on how SHM techniques can be applied to aircraft, mechanical and civil engineering structures with particular emphasis on composite materials. This will be a valuable reference resource for R&D managers, materials scientists, and engineers working in the aerospace sector, for researchers and system designers working in industry, and for academia and government research agencies developing new systems for the SHM of aerospace, mechanical, and civil engineering structures.

Advanced Ceramics for Photocatalytic Membranes: Synthesis Methods, Characterization and Performance Analysis, and Applications in Water and Wastewater Treatment reviews recent research on the application and use of advanced ceramic materials in photocatalytic membrane processes. Sections cover current developments in photocatalytic membrane processes, synthesis and fabrication techniques using either physical or chemical approaches, diverse characterization methods and performance evaluations, and various types of environmental applications. The book is not only limited to the conceptual theory, it also gives a detailed review of recent progress in materials science. Readers will find applications in different disciplines, i.e., chemistry, physics, and mechanics that are critically required in modern science and engineering. This across-the-board briefing on the field is suitable for use as a major reference, as well as a knowledge sharing tool.

This book provides critical insights into the properties and applications of melt-blown fibers in the polymer composite field. The book offers a comprehensive overview of the melt-blowing process and explores the intricate structure-property-parameter relationship of melt-blown fibers. In addition, the book presents a straightforward method for manufacturing multiscale Polypropylene single-polymer composites and carbon-nanotube-doped Polypropylene melt-blown fibers.

This volume presents recent advances and current knowledge in the field of supramolecular assemblies based on electrostatic interactions. The flexibility and simplicity of constructing assemblies is explained via several examples, illustrations, figures, case studies, and historical perspectives. Moreover, as there is an increasing demand for the use of theoretical and computational models of the interaction strengths for assisting with the experimental studies, one chapter specifically focuses on the "e;modelling'' of supramolecular assemblies. Finally, various aspects of the recent advances of the field as well as potential future opportunities are discussed, with the goal being to stimulate critical discussions among the community and to encourage further discovery. This volume aims to inspire and guide fellow scientists and students working in this field and thus it provides a great tool for all researchers, graduates and professionals specializing on the topic.

This book provides a comprehensive overview of the current progress in fiber-reinforced plastics (FRP), covering manufacturing, mechanical behavior, and resistance performance. It includes the elastic and damage behavior of unidirectional FRP, and highlights the improvements achieved by adding multiwall carbon nanotubes. The material resistance is assessed through fatigue response, local behavior, local properties, and failure mechanisms, including crack density and microcrack propagation behavior. The book also explores the degradation of macroscopic mechanical properties such as elastic modulus and compressive strength versus plastic strains. Additionally, it focuses on the progress made in out-of-plane composite characterization and modeling response for simulations of critical mechanical parts currently used in different industries, thanks to advances in manufacturing techniques that allow for the production of increasingly complex and thicker geometries.

Shape Memory Composites Based on Polymers and Metals for 4D Printing is a thorough discussion of the physics and chemistry behind this developing area of materials science. It provides readers with a clear exposition of shape-memory-composite (SMC) preparation techniques for 3D and 4D printing processes and explains how intelligent manufacturing technology may be applied in fields such as robotics, construction, medical science, and smart sensors.The book covers fundamental background knowledge on the synthesis of shape memory polymers (SMPs) and shape memory alloys (SMAs), and additive manufacturing techniques. Polymers and metals and their roles in 4D printing are dealt with separately, and applications of 4D printing are treated in their own chapter. The different alloy compositions and nanoparticle fillers in polymer composites are examined in detail, along with the key mechanisms involved in their processing. Hybrid nanofillers and synergistic composite mixtures, which are either in extensive current use or have shown promising outcomes in the field of 4D printing, are thoroughly discussed. Differences between these novel SMCs and traditional metal alloys, organic and inorganic composites are presented, and means by which they can improve mechanical properties that are triggered by external sources like magnetic field, temperature, and pH of solvent, are set out. This book provides practitioners, industrial researchers, and scholars with a state-of-the-art overview of SMP/SMA synthesis, additive manufacturing, modification in synthesis of SMCs for 4D printing, and their likely future applications.

This book contains full papers presented at the First Virtual Conference on Mechanical Fatigue (VCMF 2020), which was organised by the University of Porto (FEUP, Portugal), the Wroclaw University of Science and Technology (Poland), University of Electronic Science and Technology of China (China), Siberian Federal University (Russia), and the ESIS/TC12 Technical Committee (European Structural Integrity Society-ESIS), between 9 and 11 of September 2020. This conference was intended to be a forum of discussion of new research concepts, equipment, technology, materials and structures and other scientific advances within the field of mechanical fatigue and fracture. The first edition of the VCMF 2020 event has reached more than 60 participants from more than 20 nationalities demonstrating the vitality of this new event.

Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science.

This volume deals with the various fabrication techniques, surface functionalization and biomedical applications of polymeric fibers possessing different scale and structure. It provides an overview of fabrication techniques such as Co-axial, Centrifugal, Melt and Yarning to procure multiscale, tubular and layered fibrous scaffold employed for biomedical applications. The chapters in this volume discusse the surface/chemical functionalization of fibers which enhance the biological properties of the fibrous scaffolds as well as the development of hybrid, layered and external stimuli-responsive fibrous scaffolds that hold potential application in biosensor and other biomedical fields. In addition, recent advances and applications of polymeric multiscale fibers in tissue engineering, regenerative medicine and drug delivery are presented. The potential use of fibrous scaffolds in bone, neural, tendon/ligament and cardiac tissue engineering, nanofibers as an antimicrobial wound dressing, employed in cancer theragnostics and in the treatment of skin/periodontal infections are discussed. The volume provides expert knowledge on the fabrication techniques, development of different scale and hybrid structure fibers, surface functionalization, layered and external stimuli responsive fibrous scaffolds. It will be beneficial to material/biomaterials scientists, bioengineering and biotechnologists by providing a better understanding on the subject of the innovative applications of fibrous scaffolds in drug delivery, tissue engineering, wound dressings and regenerative medicine.

This book presents the latest studies in the synthesis and application of boron nitride (BN) composites as multifunctional materials for advanced technologies. BN, the second hardest material after diamond, has different allotropic forms similar to carbon and can exist as nanosheets, nanotubes, nanoshells, and 3D permeable nanostructure. The different chapters in this book highlight the BN nanostructures and its composite materials synthesized with conducting polymer, epoxy, nylon, graphene, and natural fiber composite, to produce materials with enhanced properties such as excellent mechanical wear resistance, superior thermal conductivity, and unique electronic properties. This book caters to researchers and academics interested in BN-based composite and its potential applications in nanoscale electrical and thermal devices and metal-free electro- and photo-catalysts.