Download or read book Poly capro lactone Networks as Actively Moving Polymers written by Yuan Meng and published by . This book was released on 2016 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Shape-memory polymers (SMPs), as a subset of actively moving polymers, form an exciting class of materials that can store and recover elastic deformation energy upon application of an external stimulus. Although engineering of SMPs nowadays has lead to robust materials that can memorize multiple temporary shapes, and can be triggered by various stimuli such as heat, light, moisture, or applied magnetic fields, further commercialization of SMPs is still constrained by the material's incapability to store large elastic energy, as well as its inherent one-way shape-change nature. This thesis develops a series of model semi-crystalline shape-memory networks that exhibit ultra-high energy storage capacity, with accurately tunable triggering temperature; by introducing a second competing network, or reconfiguring the existing network under strained state, configurational chain bias can be effectively locked-in, and give rise to two-way shape-actuators that, in the absence of an external load, elongates upon cooling and reversibly contracts upon heating. We found that well-defined network architecture plays essential role on strain-induced crystallization and on the performance of cold-drawn shape-memory polymers. Model networks with uniform molecular weight between crosslinks, and specified functionality of each net-point, results in tougher, more elastic materials with a high degree of crystallinity and outstanding shape-memory properties. The thermal behavior of the model networks can be finely modified by introducing non-crystalline small molecule linkers that effectively frustrates the crystallization of the network strands. This resulted in shape-memory networks that are ultra-sensitive to heat, as deformed materials can be efficiently triggered to revert to its permanent state upon only exposure to body temperature. We also coupled the same reaction adopted to create the model network with conventional free-radical polymerization to prepare a dual-cure 'double network' that behaves as a real thermal 'actuator'. This approach places sub-chains under different degrees of configurational bias within the network to utilize the material's propensity to undergo stress-induced crystallization. Reconfiguration of model shape-memory networks containing photo-sensitive linkages can also be employed to program two-way actuator. Chain reshuffling of a partially reconfigurable network is initiated upon exposure to light under specific strains. Interesting photo-induced creep and stress relaxation behaviors were demonstrated and understood based on a novel transient network model we derived. In summary, delicate manipulation of shape-memory network architectures addressed critical issues constraining the application of this type of functional polymer material. Strategies developed in this thesis may provide new opportunity to the field of shape-memory polymers"--Pages vii-viii.
Download or read book Actively Moving Polymers written by and published by . This book was released on 2010 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Actively Moving Polymers written by Andreas Lendlein and published by . This book was released on 2015-06-30 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years there has been a surge of interest in actively moving polymers, materials which can change shape in response to specific stimuli, as they can be used in well-known technologies such as packaging materials, but also as smart textiles and promising biomedical applications such as artificial muscles. To date, there is currently no resource covering the full array of these interesting materials. Actively Moving Polymers will cover both shape-memory polymers (materials which can be deformed into a new temporary shape and recover their original shape) and shape-changing polymers (materials which change their shape as long as they are exposed to a stimulus, such as expansion or shrinking). The book explores both the fundamental mechanisms and applications of different systems including dual-shape polymers, shape-memory composites, water-triggered shape changes, thermally-induced shape-changing polymers and self-oscillating gels. Readers will gain a comprehensive overview of actively moving polymers from leading scientists in the field and through example applications inspiration for new product ideas. This book provides everything you need to know about actively moving polymers in one place.
Download or read book Shape Memory Polymers for Biomedical Applications written by L Yahia and published by Elsevier. This book was released on 2015-03-19 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory polymers (SMPs) are an emerging class of smart polymers which give scientists the ability to process the material into a permanent state and predefine a second temporary state which can be triggered by different stimuli. The changing chemistries of SMPs allows scientists to tailor important properties such as strength, stiffness, elasticity and expansion rate. Consequently SMPs are being increasingly used and developed for minimally invasive applications where the material can expand and develop post insertion. This book will provide readers with a comprehensive review of shape memory polymer technologies. Part 1 will discuss the fundamentals and mechanical aspects of SMPs. Chapters in part 2 will look at the range of technologies and materials available for scientific manipulation whilst the final set of chapters will review applications. Reviews the fundamentals of shape memory polymers with chapters focussing on the basic principles of the materials Comprehensive coverage of design and mechanical aspects of SMPs Expert analysis of the range of technologies and materials available for scientific manipulation
Download or read book Shape Memory Polymers and Multifunctional Composites written by Jinsong Leng and published by CRC Press. This book was released on 2010-05-25 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Admired for their extraordinary stimuli-sensitive behavior and shape-changing capabilities, shape-memory polymers (SMPs) and multifunctional composites are among the most important smart materials. They continue to be widely applied in many diverse fields to create things such as self-deployable spacecraft structures, morphing structures, SMP foams
Download or read book Shape Memory Polymer Derived Nanocomposites written by Ayesha Kausar and published by Elsevier. This book was released on 2024-01-22 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape Memory Polymer derived Nanocomposites: Features to Cutting-Edge Advancements summarizes the up-to-date of fundamentals and applications of the shape memory polymer derived nanocomposites. Design and fabrication of shape memory polymeric nanocomposites have gained significant importance in the field of up-to-date nano/materials science and technology. In recent times, the shape memory polymers and nanocomposites have attracted considerable academic and industrial research interest. This feature book will present a state-of-the-art assessment on the versatile shape memory materials. The flexibility, durability, heat stability, shape deformability, and shape memory features of these polymers have shown dramatic improvements with the nanofiller addition. Appropriate choice of the stimuli-responsive polymer, nanofiller type and content, and fabrication strategies may lead to enhanced physicochemical features and stimuli-responsive performance. Several successful stimuli-responsive effects have been achieved in the shape memory nanocomposites such as thermo-responsive, electro-active, photo-active, water/moisture-responsive, pH-sensitive, etc. Consequently, the shape memory polymer based nanocomposites have found applications in high-tech devices and applications. This book initially offers a futuristic knowledge regarding indispensable features of the shape memory polymeric nanocomposites. Afterwards, the essential categories of the stimuli-responsive polymer-based nanocomposites have been discussed in terms of recent scientific literature. Subsequent sections of this book are dedicated to the potential of shape memory polymer-based nanocomposite in various technical fields. Significant application areas have been identified as foam materials, aerospace, radiation shielding, sensor, actuator, supercapacitor, electronics and biomedical relevance. The book chapters also point towards the predictable challenges and future opportunities in the field of shape memory nanocomposites. Provides the essentials of shape memory polymeric nanocomposites Includes important categories of shape memory nanocomposites Presents current technological applications of shape memory polymers and derived nanocomposite in sponges, aerospace, EMI shielding, ionizing radiation shielding, sensors, actuator, supercapacitor, electronics, and biomedical fields
Download or read book Shape Memory Composites Based on Polymers and Metals for 4D Printing written by Muni Raj Maurya and published by Springer Nature. This book was released on 2022-05-18 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book New Polymeric Composite Materials written by Inamuddin and published by Materials Research Forum LLC. This book was released on 2016-11 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric and composite materials are in high demand and their continuing development is making our life style more comfortable. The present book reviews the latest research results in the field and explores the technological advantages of these materials in environmental, biomedical, actuator and fuel cell applications. Also discussed are applications of polymeric and composite materials in such areas as shape memory polymers, green composites for artificial organs, geomembranes for the safe disposal of waste, removal of heavy metals and dyes, adhesives, sensors and actuators, fuel cells, membrane and environmental sustainability, etc.
Download or read book Medical Device Materials V written by Jeremy Gilbert and published by ASM International. This book was released on 2010 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smart Materials in Additive Manufacturing volume 2 4D Printing Mechanics Modeling and Advanced Engineering Applications written by Mahdi Bodaghi and published by Elsevier. This book was released on 2022-06-25 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart Materials in Additive Manufacturing, Volume 2 covers the mechanics, modeling, and applications of the technology and the materials produced by it. It approaches the topic from an engineering design perspective with cutting-edge modeling techniques and real-world applications and case studies highlighted throughout. The book demonstrates 4D printing techniques for electro-induced shape memory polymers, pneumatic soft actuators, textiles, and more. Modeling techniques with ABAQUS and machine learning are outlined, as are manufacturing techniques for highly elastic skin, tunable RF and wireless structures and modules, and 4D printed structures with tunable mechanical properties. Closed-loop control of 4D printed hydrogel soft robots, hierarchical motion of 4D printed structures using the temperature memory effect, multimaterials 4D printing using a grasshopper plugin, shape reversible 4D printing, and variable stiffness 4D printing are each discussed as well. Outlines cutting-edge techniques, structural design, modeling, simulation, and tools for application-based 4D printing Details design, modeling, simulation, and manufacturing considerations for various fields Includes case studies demonstrating real-world situations where the techniques and concepts discussed were successfully deployed Applications covered include textiles, soft robotics, auxetics and metamaterials, micromachines, sensors, bioprinting, and wireless devices Covers the mechanics, manufacturing processes and applications of 4D-printed smart materials and structures Discusses applications in civil, mechanical, aerospace, polymer and biomedical engineering Presents experimental, numerical and analytical studies in a simple and straightforward manner, providing tools that can be immediately implemented and adapted by readers to fit their work
Download or read book Encyclopedia of Polymer Applications 3 Volume Set written by Munmaya Mishra and published by CRC Press. This book was released on 2018-12-17 with total page 6778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Undoubtedly the applications of polymers are rapidly evolving. Technology is continually changing and quickly advancing as polymers are needed to solve a variety of day-to-day challenges leading to improvements in quality of life. The Encyclopedia of Polymer Applications presents state-of-the-art research and development on the applications of polymers. This groundbreaking work provides important overviews to help stimulate further advancements in all areas of polymers. This comprehensive multi-volume reference includes articles contributed from a diverse and global team of renowned researchers. It offers a broad-based perspective on a multitude of topics in a variety of applications, as well as detailed research information, figures, tables, illustrations, and references. The encyclopedia provides introductions, classifications, properties, selection, types, technologies, shelf-life, recycling, testing and applications for each of the entries where applicable. It features critical content for both novices and experts including, engineers, scientists (polymer scientists, materials scientists, biomedical engineers, macromolecular chemists), researchers, and students, as well as interested readers in academia, industry, and research institutions.
Download or read book Biomedical Engineering written by Reza Fazel-Rezai and published by BoD – Books on Demand. This book was released on 2011-08-01 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: In all different areas in biomedical engineering, the ultimate objectives in research and education are to improve the quality life, reduce the impact of disease on the everyday life of individuals, and provide an appropriate infrastructure to promote and enhance the interaction of biomedical engineering researchers. This book is prepared in two volumes to introduce recent advances in different areas of biomedical engineering such as biomaterials, cellular engineering, biomedical devices, nanotechnology, and biomechanics. It is hoped that both of the volumes will bring more awareness about the biomedical engineering field and help in completing or establishing new research areas in biomedical engineering.
Download or read book Advances in Regenerative Medicine Role of Nanotechnology and Engineering Principles written by Venkatram Prasad Shastri and published by Springer Science & Business Media. This book was released on 2010-08-14 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the NATO Advanced Research Workshop (ARW) on “Nanoengineered Systems for Regenerative Medicine” that was organized under the auspices of the NATO Security through Science Program. I would like to thank NATO for supporting this workshop via a grant to the co-directors. The objective of ARW was to explore the various facets of regenerative me- cine and to highlight role of the “the nano-length scale” and “nano-scale systems” in defining and controlling cell and tissue environments. The development of novel tissue regenerative strategies require the integration of new insights emerging from studies of cell-matrix interactions, cellular signalling processes, developmental and systems biology, into biomaterials design, via a systems approach. The chapters in the book, written by the leading experts in their respective disciplines, cover a wide spectrum of topics ranging from stem cell biology, developmental biology, ce- matrix interactions, and matrix biology to surface science, materials processing and drug delivery. We hope the contents of the book will provoke the readership into developing regenerative medicine paradigms that combine these facets into cli- cally translatable solutions. This NATO meeting would not have been successful without the timely help of Dr. Ulrike Shastri, Sanjeet Rangarajan and Ms. Sabine Benner, who assisted in the organization and implementation of various elements of this meeting. Thanks are also due Dr. Fausto Pedrazzini and Ms. Alison Trapp at NATO HQ (Brussels, Belgium). The commitment and persistence of Ms.
Download or read book Aspects of Polyurethanes written by Faris Yılmaz and published by BoD – Books on Demand. This book was released on 2017-09-27 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. Because a variety of diisocyanates and a wide range of polyols can be used to produce polyurethane, a broad spectrum of materials can be produced to meet the needs of specific applications. During World War II, a widespread use of polyurethanes was first seen, when they were used as a replacement for rubber, which at that time was expensive and hard to obtain. During the war, other applications were developed, largely involving coatings of different kinds, from airplane finishes to resistant clothing. Subsequent decades saw many further developments and today we are surrounded by polyurethane applications in every aspect of our everyday lives. While polyurethane is a product that most people are not overly familiar with, as it is generally "hidden" behind covers or surfaces made of other materials, it would be hard to imagine life without polyurethanes.
Download or read book Applications of High Energy Radiations written by Subhendu Ray Chowdhury and published by Springer Nature. This book was released on 2023-05-14 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the applications of high-energy beam radiation for synthesis and processing of polymeric materials. It addresses fundamental nature of high energy i.e., ionizing radiations and interaction with monomers and polymers leading to a wide variety of products such as tyres, textiles, shape memory polymers, polymers for aviation and space applications, polymeric biomaterials and natural rubber latex. It discusses general principles and techniques of preparation of polymeric materials including polymer blends, composites and nanocomposites. It also includes the topic of radiation-assisted recycling of polymers through breaking of covalent bonds. This book will be useful for students, researchers and professionals in the areas of polymers science and technology, radiation technology, electron beam technology, gamma radiation technology, advanced materials technology, biomaterials technology, nanotechnology, membrane science technology and environmental science.
Download or read book Macromolecular Science and Engineering written by Yoshikazu Tanabe and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering current advances in the science and technology of polymeric and organic materials, each chapter is a self-contained review of progress, and particular emphasis has been placed on obtaining an overall understanding of the state of the art in each area. This is the first book to provide a background perspective on this field of research, and is suitable for both professional researchers and postgraduate students.
Download or read book Shape Memory Polymers written by Jinlian Hu and published by Smithers Rapra. This book was released on 2014-05-27 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape-memory polymers (SMP) are a unique branch of the smart materials family which are capable of changing shape on-demand upon exposure to external stimulus. The discovery of SMP made a significant breakthrough in the developments of novel smart materials for a variety of engineering applications, superseded the traditional materials, and also influenced the current methods of product designing. This book provides the latest advanced information of on-going research domains of SMP. This will certainly enlighten the reader to the achievements and tremendous potentials of SMP. The basic fundamentals of SMP, including shape-memory mechanisms and mechanics are described. This will aid reader to become more familiar with SMP and the basic concepts, thus guiding them in undergoing independent research in the SMP field. The book also provides the reader with associated challenges and existing application problems of SMP. This could assist the reader to focus more on these issues and further exploit their knowledge to look for innovative solutions. Future outlooks of SMP research are discussed as well. This book should prove to be extremely useful for academics, R&D managers, researcher scientists, engineers, and all others related to the SMP research.
