Visar resultat för..."Memory foam"

In 2017, a routine differential scanning calorimetry trace showed a thermal peak that should not exist. The material had been stored at room temperature for six months. It had never been heated above 25 degrees Celsius. The peak appeared at 41 degrees Celsius.It was a peak the material had no business knowing about.In Entropic Memory Foam, materials scientist Dr. Sylvex Paronthal presents the discovery, the evidence, the fierce scientific debate, and the profound implications of a class of thermoresponsive polymeric composites that appear to encode information about their probable future thermal environment during synthesis. Confirmed independently by four research groups using differential scanning calorimetry, small-angle X-ray scattering, neutron scattering, solid-state NMR, and atomic force microscopy, the phenomenon known as prospective molecular memory challenges the simplest reading of the second law of thermodynamics while remaining, on careful analysis, fully consistent with it.This is not a book about magic. It is a book about the thermodynamics of non-equilibrium synthesis, about what happens when a crosslinked polymer network is created under controlled entropy gradients, and about what the architecture of the resulting material can encode. Drawing on Boltzmann's entropy formula, Prigogine's dissipative structures, Landauer's information-erasure principle, and England's dissipative adaptation theory, Paronthal builds a rigorous physical framework for understanding how matter can develop a probabilistic model of its own future without violating any known law of physics.The applications are extraordinary. Drug delivery systems that release therapeutic agents before the peak of inflammation rather than after it. Building envelopes that begin insulating before the peak solar load arrives. Orthopedic implants that stiffen in anticipation of mechanical demand. Agricultural films that insulate crops before the frost, not during it. Neuromorphic computing substrates that encode the probable future input distribution alongside the historical one.And beneath the applications is a deeper question: if matter can anticipate, if the physics of non-equilibrium self-organization can encode a probabilistic model of the future in the architecture of a material, what does that tell us about the relationship between thermodynamics, information, and time? About the arrow of time in complex systems? About the physical basis of anticipation in biological organisms?Written with the precision of a scientist who spent seven years trying to explain away his own discovery, Entropic Memory Foam is the book about the future of materials science that could only be written by someone who let the anomalies speak.The material did not know what would happen. It just remembered it before it did.

Polyurethane Polymers: Composites and Nanocomposites concentrates on the composites and nanocomposites of polyurethane based materials. Polyurethane composites are a very important class of materials widely used in the biomedical and industrial field that offer numerous potential applications in many areas. This book discusses current research and identifies future research needs in the area.

Provides an elaborate coverage of the chemistry of polyurethane, its synthesis, and properties Includes available characterization techniques Relates types of polyurethanes to their potential properties Discusses composites, nanocomposites options, and PU recycling

Handbook of Thermoplastic Elastomers, Second Edition presents a comprehensive working knowledge of thermoplastic elastomers (TPEs), providing an essential introduction for those learning the basics, but also detailed engineering data and best practice guidance for those already involved in polymerization, processing, and part manufacture.

TPEs use short, cost-effective production cycles, with reduced energy consumption compared to other polymers, and are used in a range of industries including automotive, medical, construction and many more. This handbook provides all the practical information engineers need to successfully utilize this material group in their products, as well as the required knowledge to thoroughly ground themselves in the fundamental chemistry of TPEs. The data tables included in this book assist engineers and scientists in both selecting and processing the materials for a given product or application.

In the second edition of this handbook, all chapters have been reviewed and updated. New polymers and applications have been added�- particularly in the growing automotive and medical fields - and changes in chemistry and processing technology are covered.

Provides essential knowledge of the chemistry, processing, properties, and applications for both new and established technical professionals in any industry utilizing TPEs Datasheets provide "at-a-glance" processing and technical information for a wide range of commercial TPEs and compounds, saving readers the need to contact suppliers Includes data on additional materials and applications, particularly in automotive and medical industries

Shape-Memory Polymer Device Design discusses the latest shape-memory polymers and the ways they have started to transition out of the academic laboratory and into devices and commercial products. Safranski introduces the properties of shape-memory polymers and presents design principles for designing and manufacturing, providing a guide for the R&D engineer/scientist and design engineer to add the shape memory effect of polymers into their design toolbox.

This is the first book to focus on applying basic science knowledge to design practical devices, introducing the concept of shape-memory polymers, the history of their use, and the range of current applications. It details the specific design principles for working with shape-memory polymers that don't often apply to mechanically inactive materials and products.

Material selection is thoroughly discussed because chemical structure and thermo-mechanical properties are intrinsically linked to shape-memory performance. Further chapters discuss programming the temporary shape and recovery through a variety of activation methods with real world examples. Finally, current devices across a variety of markets are highlighted to show the breadth of possible applications.

Demystifies shape-memory polymers, providing a guide to their properties and design principles Explores a range of current and emerging applications across sectors, including biomedical, aerospace/automotive, and consumer goods Places shape-memory polymers in the design toolkit of R&D scientists/engineers and design engineers Discusses material selection in-depth because chemical structure and thermo-mechanical properties are intrinsically linked to shape-memory performance

Materials for Advanced Heat Transfer Systems presents the latest research and technologies developed for high-performance materials in heat transfer and cooling. The book compiles sought after research academics and industry experts need to adopt to solve common problems in critical areas of heat transfer and cooling to help advance the field further. A variety of methodologies are included to synthesize the material used, along with the correct procedures to follow to ensure appropriate and effective use. Various case studies are presented to help the reader further understand the benefits and challenges of the materials discussed.

Researchers, academics, students and engineers working on heat transfer systems will benefit from this interdisciplinary and applications-focused reference and be guided through various methodologies to make informed decisions based on the latest research and technologies available.

Presents current and futuristic materials that are being synthesized or used for improving heat transfer mechanisms of a system Applies the technologies, models and methods to a variety of applications, including power generation, aerospace, electronics and automobiles Includes recent case studies which exemplify the concepts and technologies analyzed

Remanufacturing and Advanced Machining Processes for Materials and Components presents current and emerging techniques for machining of new materials and restoration of components, as well as surface engineering methods aimed at prolonging the life of industrial systems. It examines contemporary machining processes for new materials, methods of protection and restoration of components, and smart machining processes.Details a variety of advanced machining processes, new materials joining techniques, and methods to increase machining accuracyPresents innovative methods for protection and restoration of components primarily from the perspective of remanufacturing and protective surface engineeringDiscusses smart machining processes, including computer-integrated manufacturing and rapid prototyping, and smart materialsProvides a comprehensive summary of state-of-the-art in every section and a description of manufacturing methodsDescribes the applications in recovery and enhancing purposes and identifies contemporary trends in industrial practice, emphasizing resource savings and performance prolongation for components and engineering systemsThe book is aimed at a range of readers, including graduate-level students, researchers, and engineers in mechanical, materials, and manufacturing engineering, especially those focused on resource savings, renovation, and failure prevention of components in engineering systems.

Remanufacturing and Advanced Machining Processes for Materials and Components presents current and emerging techniques for machining of new materials and restoration of components, as well as surface engineering methods aimed at prolonging the life of industrial systems. It examines contemporary machining processes for new materials, methods of protection and restoration of components, and smart machining processes.Details a variety of advanced machining processes, new materials joining techniques, and methods to increase machining accuracyPresents innovative methods for protection and restoration of components primarily from the perspective of remanufacturing and protective surface engineeringDiscusses smart machining processes, including computer-integrated manufacturing and rapid prototyping, and smart materialsProvides a comprehensive summary of state-of-the-art in every section and a description of manufacturing methodsDescribes the applications in recovery and enhancing purposes and identifies contemporary trends in industrial practice, emphasizing resource savings and performance prolongation for components and engineering systemsThe book is aimed at a range of readers, including graduate-level students, researchers, and engineers in mechanical, materials, and manufacturing engineering, especially those focused on resource savings, renovation, and failure prevention of components in engineering systems.

Polymeric Foams Structure-Property-Performance: A Design Guide is a response to the design challenges faced by engineers in a growing market with evolving standards, new regulations, and an ever-increasing variety of application types for polymeric foam. Bernard Obi, an author with wide experience in testing, characterizing, and applying polymer foams, approaches this emerging complexity with a practical design methodology that focuses on understanding the relationship between structure-properties of polymeric foams and their performance attributes. The book not only introduces the fundamentals of polymer and foam science and engineering, but also goes more in-depth, covering foam processing, properties, and uses for a variety of applications.

By connecting the diverse technologies of polymer science to those from foam science, and by linking both micro- and macrostructure-property relationships to key performance attributes, the book gives engineers the information required to solve pressing design problems involving the use of polymeric foams and to optimize foam performance. With a focus on applications in the automotive and transportation industries, as well as uses of foams in structural composites for lightweight applications, the author provides numerous case studies and design examples of real-life industrial problems from various industries and their solutions.

Provides the science and engineering fundamentals relevant for solving polymer foam application problems Offers an exceptionally practical methodology to tackle the increasing complexity of real-world design challenges faced by engineers working with foams Discusses numerous case studies and design examples, with a focus on automotive and transportation Utilizes a practical design methodology focused on understanding the relationship between structure-properties of polymeric foams and their performance attributes