Download or read book Actively Moving Polymers written by and published by . This book was released on 2010 with total page 0 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 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 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.
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 Polymers written by Andreas Lendlein and published by Springer Science & Business Media. This book was released on 2010-06-11 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of Contents -Shape-Memory Polymers and Shape-Changing Polymers By M. Behl, J. Zotzmann, and A. Lendlein -Shape-Memory Polymer Composites By Samy A. Madbouly and Andreas Lendlein -Characterization Methods for Shape-Memory Polymers By W. Wagermaier, K. Kratz, M. Heuchel, and A. Lendlein -Shape-Memory Polymers for Biomedical Applications By Christopher M. Yakacki and Ken Gall -Controlled Drug Release from Biodegradable Shape-Memory Polymers By ChristianWischke, Axel T. Neffe, and Andreas Lendlein
Download or read book Polyurethane Shape Memory Polymers written by W.M. Huang and published by CRC Press. This book was released on 2011-09-08 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory polymers (SMPs) are some of the most important and valuable engineering materials developed in the last 25 years. These fascinating materials demonstrate remarkably versatile properties-including capacity for actuation and stimulus responsiveness-that are enabling technologists to develop applications used to explore everything from th
Download or read book Design and Characterization of Actively moving Polymers Obtained Via Dual curing Processing written by Alberto Francisco Belmonte Parra and published by . This book was released on 2018 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: En aquesta tesis doctoral s'ha dut a terme la síntesis, caracterització i modelització dels Actively-moving Polymers o polímers que responen a estímuls externs amb canvis dimensionals. Per una banda s'han sintetitzat i caracteritzat polímers amb memòria de forma de base epoxídica amb compostos tiols mitjançant reaccions del tipus "click" i processat amb sistemes de curat dual seqüencial. S'ha estudiat l'efecte de les propietats de xarxa, relaxacions estructurals, propietats termo-mecàniques i condicions de programació amb la capacitat de memòria de forma. Per això, s'han realitzat assajos dinamo-mecànics, termo-mecànics, reològics i calorimètrics, així com cicles de memòria de forma. Per una altra banda s'han sintetitzat i caracteritzat xarxes cristall líquid amb propietats de canvi de forma de base epoxídica amb àcids dicarboxílics. En aquest cas, a més de les propietats de xarxa i termo-mecàniques, s'ha relacionat les propietats cristall líquid amb la capacitat de canvi de forma. Per això s'han realitzat cicles de canvi de forma amb diferents nivells de tensió en diferents condicions experimentals. Finalment, s'han combinat els polímers epoxídics obtinguts mitjançant curat dual amb les xarxes cristall líquid per dissenyar actuadors mecànics autònoms, és a dir, actuadors que canvien alternativament de forma sota l'acció d'un estímul tèrmic. S'han dissenyat diferents muntatges d'actuadors i s'ha estudiat el nivell i la velocitat d'actuació sota diferents condicions d'escalfament i refredament.
Download or read book Polymer Mechanochemistry written by Roman Boulatov and published by Springer. This book was released on 2015-10-17 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students.
Download or read book Liquid Crystal Elastomers written by Mark Warner and published by Oxford University Press. This book was released on 2007-04-05 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is a primer for liquid crystals, polymers, rubber and elasticity. It is directed at physicists, chemists, material scientists, engineers and applied mathematicians at the graduate student level and beyond.
Download or read book The Essential Handbook of Polymer Terms and Attributes written by Munmaya K Mishra and published by CRC Press. This book was released on 2024-07-30 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Essential Handbook of Polymer Terms and Attributes not only acts as an encyclopaedia of polymer science but also fosters an appreciation for the significance of polymers in fields including materials science, chemistry, engineering, and medicine. This book serves as an excellent reference book, covering every possible term and attribution associated with the vast and diverse field of polymers. This comprehensive volume serves as a vital resource for researchers working in industry and academia, offering a clear and concise exploration of polymer science with the most essential reference data available. Each polymer term is defined in a straightforward manner, ensuring that readers of all levels can grasp the concepts. The book goes beyond mere definitions, providing context and insights into the applications, properties, and synthesis. Bringing polymer terms and attributes together in one place, the book provides a broad knowledge of polymer science and facilitates idea generation for researchers and students embarking on projects related to a specific field of polymer science. Key features: This book covers all possible terms associated with the field of “polymers" and related areas, granting readers a comprehensive understanding of the entire spectrum of polymers. The organization of the book follows an alphabetical format, enabling quick and convenient access to specific terms. Each polymer term is clearly defined with a figure or scheme as needed, allowing readers to visualize the structures, processes, and applications involved. This book is written for science students, chemists, polymer scientists, chemical engineers, pharmaceutical scientists, biomedical scientists, biotechnologists, product formulators, materials scientists, and scientists working on polymers.
Download or read book Structure and Dynamics of Confined Polymers written by John J. Kasianowicz and published by Springer Science & Business Media. This book was released on 2002-07-31 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are essential to biology because they can have enough stable degrees of freedom to store the molecular code of heredity and to express the sequences needed to manufacture new molecules. Through these they perform or control virtually every function in life. Although some biopolymers are created and spend their entire career in the relatively large free space inside cells or organelles, many biopolymers must migrate through a narrow passageway to get to their targeted destination. This suggests the questions: How does confining a polymer affect its behavior and function? What does that tell us about the interactions between the monomers that comprise the polymer and the molecules that confine it? Can we design and build devices that mimic the functions of these nanoscale systems? The NATO Advanced Research Workshop brought together for four days in Bikal, Hungary over forty experts in experimental and theoretical biophysics, molecular biology, biophysical chemistry, and biochemistry interested in these questions. Their papers collected in this book provide insight on biological processes involving confinement and form a basis for new biotechnological applications using polymers. In his paper Edmund DiMarzio asks: What is so special about polymers? Why are polymers so prevalent in living things? The chemist says the reason is that a protein made of N amino acids can have any of 20 different kinds at each position along the chain, resulting in 20 N different polymers, and that the complexity of life lies in this variety.
Download or read book Multifunctional Polymer Nanocomposites written by Jinsong Leng and published by CRC Press. This book was released on 2010-12-21 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: The novel properties of multifunctional polymer nanocomposites make them useful for a broad range of applications in fields as diverse as space exploration, bioengineering, car manufacturing, and organic solar cell development, just to name a few. Presenting an overview of polymer nanocomposites, how they compare with traditional composites, and th
Download or read book Active Coatings for Smart Textiles written by Jinlian Hu and published by Woodhead Publishing. This book was released on 2016-04-06 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active Coatings for Smart Textiles presents the latest information on active materials and their application to textiles in the form of coatings and finishes for the purpose of improving performance and creating active functional effects. This important book provides detailed coverage of smart coating types, processes, and applications. After an introduction to the topic, Part One introduces various types of smart and active coatings, including memory polymer coatings, durable and self-cleaning coatings, and breathable coatings. Technologies and related processes for the application of coatings to textiles is the focus of Part Two, with chapters devoted to microencapsulation technology, plasma surface treatments, and nanotechnology-based treatments. The book ends with a section on applications of smart textiles with responsive coatings, which are increasingly finding commercial niches in sportswear, protective clothing, medical textiles, and architecture. Introduces various types of smart and active coatings for textiles Covers technologies and application processes for the coating and finishing of textiles Reviews commercial applications of such coatings, including in sportswear, protective clothing, medical textiles and architecture
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 Polymer Materials for Energy and Electronic Applications written by Huisheng Peng and published by Academic Press. This book was released on 2016-09-01 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Materials for Energy and Electronic Applications is among the first books to systematically describe the recent developments in polymer materials and their electronic applications. It covers the synthesis, structures, and properties of polymers, along with their composites. In addition, the book introduces, and describes, four main kinds of electronic devices based on polymers, including energy harvesting devices, energy storage devices, light-emitting devices, and electrically driving sensors. Stretchable and wearable electronics based on polymers are a particular focus and main achievement of the book that concludes with the future developments and challenges of electronic polymers and devices. Provides a basic understanding on the structure and morphology of polymers and their electronic properties and applications Highlights the current applications of conducting polymers on energy harvesting and storage Introduces the emerging flexible and stretchable electronic devices Adds a new family of fiber-shaped electronic devices
Download or read book Optically Active Polymers written by E. Sélégny and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first four volumes of the series on 'Charged and Reactive Polymers' have been devoted to polymers in solution (Voh. I and II) or in gel and membrane forms (Vols. III and IV). In correlation with charges, other physical or chemical properties of macro molecules have been considered. Understanding of charge and hydrophobic effects is equally important for synthetic and biopolymers or their systems. Optically Active Polymers are related to problems of the same class, since optical activity is an inherent property of both natural macromolecules as well as a great variety of polymers synthesized in the Jast twenty years. Optical activity is a physical spectral property of chiral matter caused by asymmetrical configurations, conformations and structures which have no plane and no center of symmetry and consequently have two mirror image enantiomeric forms of inverse optical rotation. The racemic mixture of chiral enantiomers is optically inactive. The most common form of optical activity was first measured at a constant wavelength by the angle of rotation of linearly polarized light. More recently the measurements have been extended to the entire range of visible and attainable ultraviolet regions where electronic transitions are observed, giving rise to the ORD technique (Optical Rotatory Dispersion). The Cotton effects appear in the region of optically active absorption bands; outside of these bands the plain curve spectrum is also dependent on all the electronic transitions of the chromophores.
