Plastik og polymerer

In the continuous pursuit of optimizing performance, development of advanced materials with highly specific properties has consistently been a critical component of aerospace engineering’s research. Aerospace Materials: Novel Technologies and Practical Applications puts strong emphasis on updating existing knowledge of a wide range of functional and structural materials and contextualizing it for industrial practice.The volume not only comprehensively covers different classes of materials, while providing an overview of each material’s mechanical and physical properties, as well as processing and testing, but also offers state-of-the-art guidance on their commercial use in the sector. Furthermore, it looks ahead to clarify what’s still needed to adapt traditional and novel materials to ever-changing aerospace technologies and related pressing sustainability challenges.The breadth of technical expertise that this international group of researchers provides proves to be an invaluable asset for users in academia and established professionals alike.

Sustainable Materials for Food Packaging and Preservation: Food Security and Sustainability discusses the recent trends and development of bio-based sustainable materials, focusing on their fabrication and application in food packaging and food preservation. This book brings together fundamental information and the most recent advances in the characterization, processing, and modification of sustainable materials and their impact on food packaging and storage of food products for improving their shelf life. Special attention is given to smart, active, and edible packaging, and the utilization of nanoemulsion and nanoencapsulation in the food industry is also discussed. In addition, the book reviews the use of proteins, polysaccharides, and microbial and chemically derived materials for food preservation.

Nonmetallic electroconductive textiles, unlike metals, offer flexibility, durability, moldability, and lightweight attributes. A brilliant quality of these textiles is the capability to alter conductivity through various external stimuli (e.g., strain, torsion, pH, humidity) to suit a specific application such as sensors, heating garments, EMI shielding, energy harvesting devices, and wearable electronics. Based on these concepts, Advances in Electrically Conductive Textiles: Materials, Characterization, and Applications has been structured into three main sections. Section I contains chapters discussing the various preparation methods of electroconductive textiles, Section II contains chapters on their characteristics and features, and Section III details the end-use applications and sustainability of these textiles.

Developments in Yarn Spinning Technologies explores the recent advancements in yarn spinning technologies, focusing on improving production and embracing sustainability. While ring spinning remains popular, newer developments in rotor spinning and natural fibre spinning systems are covered.This book also addresses challenges, including the circularity theory, providing concise insights into the evolving landscape of yarn spinning technologies. Ideal for professionals and researchers alike, this book offers valuable perspectives on the industry’s dynamic changes.

Polymer Gears discusses polymer gear design and their efficient mechanical properties, light weight, and low noise during operation. As plastic gears are replacing metallic gears in traditional and new applications, there is still lack of material characterization and complex relations between different geometric and operating parameters. Thus, polymer gear design remains an open challenge. This book serves as a comprehensive and professional guide on the topic, providing readers with current developments carried out in the field of plastic gears production, characterization, and applications. This will include material development, tribological properties, simulations, and processing methods.

Polymers for Oral Drug Delivery Technologies covers the fundamentals of oral drug delivery and various aspects of polymer technology in oral drug delivery, from classification and synthesis, to applications and regulatory factors. It presents the oral delivery¿of therapeutics for treating a number of diseases, along with the challenges of oral drug administration to assure a predictive and reproducible pharmacokinetic profile of active pharmaceutical ingredients (API).Polymers play an important role to achieve the targeted release profile consistently of an API in vivo by various functionalities like drug protection from gastric juice, fast release and supersaturation or release within a targeted area of the GI tract.

Flexible devices based on metal oxides: Achievements and prospects focuses on the integration of flexibility in electronic circuitry, sensing applications, energy conversion and storage, and environmental remediation. Flexibility in these applications offers great potential, especially in the areas of wearable sensors, solar cells, transistors, electronic skin, and human body monitoring. The book investigates flexible and wearable devices based on metal oxide nanostructures or thin films that are capable of bending, rolling, compression, and folding, all while maintaining their performance. Metal oxide nanomaterials display exceptional properties that include mechanical stress tolerance, high optical transparency, high carrier mobilities, wide band gap, high dielectric constant, and superconductivity, amongst others. In some cases, they are also earth abundant, environmentally benign, cost-effective, chemically stable, and compatible with low-cost wet-chemical synthesis routes. The focus of the book is on wearables manufactured using sustainable manufacturing methods and integrated into substrates that are flexible, inexpensive, recyclable, abundant, and lightweight, including polymer, textile, cellulose and cork substrates.

Finite Element Analysis of Polymers and its Composites offers up-to-date and significant findings on the finite element analysis of polymers and its composite materials. It is important to point out that to date there are no books that have been published on this concept. Thus, academicians, researchers, scientists, engineers, and students in the similar field will benefit from this highly applications-oriented book that summarizes the experimental, mathematical, and numerical analysis of polymers and composite materials through the finite element method. The book provides detailed and comprehensive information on mechanical properties, fatigue and creep behavior, thermal behavior, vibrational analysis, testing methods, and their modeling techniques. In addition, the book lists the main industrial sectors in which polymers and composite materials simulation is used, and their gains from it, including aeronautics, medical, aerospace, automotive, naval, energy, civil, sports, manufacturing, and even electronics.

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.

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.

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

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.

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

More than half of all injection molded plastic parts can be produced more cost-effectively and with better tolerances using foam injection molding compared to traditional compact injection molding.For the part designer, the focus is on the functionality of the molded part, not on the plastic-compatible design, which is precisely what compact injection molding requires. This book describes the necessary fundamentals of physical foam injection molding, clearly illustrated by means of detailed, industrially proven examples to show the technology's potential. Machine and mold technology are also explained in detail, and polymers suitable for the process are discussed. The focus is always on the question of whether the potential of physical foam injection molding has already been exhausted or whether it is emerging as a second standard process alongside compact injection molding.The experienced authors make it possible to look beyond the end of one's nose. The reader can see which plastic parts can be converted from compact to foam injection molding, and is encouraged to rethink the part design. With this book, specialists are able to examine an application for their own company and analyze it with regard to its economic implementation. However, the book also shows the clear limitations of this technology.Content:Foam Injection Molding and its Different Process VariantsDefinition and Characteristics of Physical Foam Injection MoldingDesign Guidelines for Foamed ComponentsPolymers for Foam Injection MoldingProcess SimulationMechanical Fundamentals of the Foam Injection Molding SystemMold TechnologyApplication Examples: Automotive/Household/Packaging/Medical

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.

Micro and nano devices are an integral part of modern technology. To address the requirements of the state-of-the-art technology, topics are selected from both chip-based and flexible electronics. A wide range of carbon materials including graphene, carbon nanotube, glass-like carbon, porous carbon, carbon black, graphite, carbon nanofiber, laser-patterned carbon and heteroatom containing carbon are covered. This goal is to elucidate fundamental carbon material science along with compatible micro- and nanofabrication techniques. Real-life example of sensors, energy storage and generation devices, MEMS, NEMS and implantable bioelectronics enable visualization of the outcome of described processes. Students will also benefit from the attractive aspects of carbon science explained in simple terms. Hybridization, allotrope classification and microstructural models are presented with a whole new outlook. Discussions on less-studied, hypothetical and undiscovered carbon forms render the contents futuristic and highly appealing.

"Sustainable Packaging Materials" provides a concise introduction to the principles and practices of packaging sustainability. It addresses the important issues that concern packaging professionals, decision makers, managers, CTOs, legislators, researchers, and students, including the viability and future of recycling, bio- and oxo-degradable materials, and plastics alternatives such as paper, glass, and metal. Also covered are new regulations such as the extended producer responsibility (EPR) laws, their consequences as to what materials are likely to be banned, and whether microplastics should be a concern for packaging companies.Written by an experienced professor, educator, author, inventor, and entrepreneur, this book offers uniquely clear answers to these challenges, helping readers to identify packaging materials that are likely to be phased out to meet new regulations, and to find alternatives to benefit their research and businesses. They will also be equipped to follow guidelines on the use of various packaging materials to stay ahead of the demands of the industry, and to make informed choices about packaging materials by considering sustainability, performance, and cost. Furthermore, they will be informed of the emerging packaging trends in both academia and industry, and understand the issues associated with microplastic pollution, and the actions recommended to mitigate these challenges.