Download or read book Dielectric Spectroscopy of Polymer Films written by E. Thomas Habib and published by . This book was released on 1974 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Broadband Dielectric Spectroscopy written by Friedrich Kremer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both an introductory course to broadband dielectric spectroscopy and a monograph describing recent dielectric contributions to current topics, this book is the first to cover the topic and has been hotly awaited by the scientific community.
Download or read book Understanding Ion Transport Confined in Multilayer Polymer Films Using Broadband Dielectric Spectroscopy written by Lei Zhu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Multilayer dielectric films, which comprise of a high dielectric constant polar polymer [e.g., poly(vinylidene fluoride) (PVDF) or nylons] and a high breakdown strength/low loss polymer [e.g., polycarbonate (PC)], are promising for next generation polymer film capacitors, because they can combine both advantageous extrinsic (interfacial polarization) and intrinsic (electronic/atomic/orientational polarizations) dielectric properties into one system. Nonetheless, polar polymers, such as PVDF and nylons, are easily contaminated with impurity ions, which are very difficult to remove. Even sub-ppm level of impurity ions can cause significant conduction loss for dielectric films. Multilayer films with nanoconfinement is an excellent approach to mitigate impurity ion conduction loss for polar polymers. In this work, confined ionic transport in multilayer films is studied by broadband dielectric spectroscopy combined with analytical simulation at both low and high alternating current electric fields. With this insightful understanding, impurity ions in PVDF layers are polarized and then locked in high glass transition temperature PC layers. Ultimately, impurity ion conduction loss is significantly reduced for multilayer films at temperatures up to 120 u00b0C.
Download or read book Broadband Dielectric Spectroscopy written by William Henry Hunter Woodward and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is about Broadband Dielectric Spectroscopy as a Modern Analytical Technique"--
Download or read book Dynamics in Geometrical Confinement written by Friedrich Kremer and published by Springer. This book was released on 2014-06-03 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the dynamics of low molecular weight and polymeric molecules when they are constrained under conditions of geometrical confinement. It covers geometrical confinement in different dimensionalities: (i) in nanometer thin layers or self supporting films (1-dimensional confinement) (ii) in pores or tubes with nanometric diameters (2-dimensional confinement) (iii) as micelles embedded in matrices (3-dimensional) or as nanodroplets. The dynamics under such conditions have been a much discussed and central topic in the focus of intense worldwide research activities within the last two decades. The present book discusses how the resulting molecular mobility is influenced by the subtle counterbalance between surface effects (typically slowing down molecular dynamics through attractive guest/host interactions) and confinement effects (typically increasing the mobility). It also explains how these influences can be modified and tuned, e.g. through appropriate surface coatings, film thicknesses or pore diameters. "Dynamics in Confinement" sums up the present state-of-the-art and introduces to the analytical methods of choice for the study of dynamics in nanometer-scale confinement.
Download or read book Dielectric Spectroscopy of Polymeric Materials written by James Patrick Runt and published by . This book was released on 1997 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with a complete discussion of the fundamentals of dielectric spectroscopy, this book examines in detail the methods used in data modeling and in such specialized techniques as high-frequency dielectric measurements and thermally stimulated currents. The book covers applications in a range of polymeric systems including solutions, blends, and liquid crystals.
Download or read book Recent Advances in Broadband Dielectric Spectroscopy written by Yuri P. Kalmykov and published by Springer. This book was released on 2012-10-19 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume considers experimental and theoretical dielectric studies of the structure and dynamics of complex systems. Complex systems constitute an almost universal class of materials including associated liquids, polymers, biomolecules, colloids, porous materials, doped ferroelectric crystals, nanomaterials, etc. These systems are characterized by a new "mesoscopic" length scale, intermediate between molecular and macroscopic. The mesoscopic structures of complex systems typically arise from fluctuations or competing interactions and exhibit a rich variety of static and dynamic behaviour. This growing field is interdisciplinary; it complements solid state and statistical physics, and overlaps considerably with chemistry, chemical engineering, materials science, and biology. A common theme in complex systems is that while such materials are disordered on the molecular scale and homogeneous on the macroscopic scale, they usually possess a certain degree of order on an intermediate, or mesoscopic, scale due to the delicate balance of interaction and thermal effects. In the present Volume it is shown how the dielectric spectroscopy studies of complex systems can be applied to determine both their structures and dynamics.
Download or read book Spectroscopy of Polymer Nanocomposites written by Sabu Thomas and published by William Andrew. This book was released on 2016-02-16 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy of Polymer Nanocomposites covers all aspects of the spectroscopic characterization of polymer nanocomposites. More than 25 spectroscopy characterization techniques – almost all used in materials science – are treated in the book, with discussion of their potentialities and limitations. By comparing the techniques with each other and presenting the techniques together with their specific application areas, the book provides scientists and engineers the information needed for solving specific problems and choosing the right technique for analyzing the material structure. From this, the dispersion structure of fillers, property relations and filler-polymer interactions can be determined, and, ultimately, the right materials can be chosen for the right applications. Besides the techniques and structure-property relations, aspects covered include: phase segregation of filler particles, filler agglomeration and deagglomeration, filler dispersion, filler-polymer interactions, surfaces and interfaces. The book also examines recent developments, as well as unresolved issues and new challenges, in the characterization of surfaces and interfaces in polymer nanocomposites. This handpicked selection of topics, and the combined expertise of contributors from industry, academia, government and private research organizations across the globe, make this survey an outstanding reference source for anyone involved in the field of polymer nanocomposites in academia or industry. Provides comprehensive coverage of spectroscopy techniques for analyzing polymer nanocomposites Enables researchers and engineers to choose the right technique and make better materials decisions in research and a range of industries Presents the fundamentals, information on structure-property relations, and all other aspects relevant for understanding spectroscopic analyses of nanoreinforced polymers and their applications
Download or read book Interface Effects on Relaxation Dynamics in Nanostructured Polymer Films Investigated by Local Dielectric Spectroscopy written by Kim Hung Nguyen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dielectric Spectroscopy of Polymers written by Péter Hedvig and published by John Wiley & Sons. This book was released on 1977 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Transitions in Foods written by Yrjo H Roos and published by Academic Press. This book was released on 2015-10-05 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase Transitions in Foods, Second Edition, assembles the most recent research and theories on the topic, describing the phase and state transitions that affect technological properties of biological materials occurring in food processing and storage. It covers the role of water as a plasticizer, the effect of transitions on mechanical and chemical changes, and the application of modeling in predicting stability rates of change. The volume presents methods for detecting changes in the physical state and various techniques used to analyze phase behavior of biopolymers and food components. It should become a valuable resource for anyone involved with food engineering, processing, storage, and quality, as well as those working on related properties of pharmaceuticals and other biopolymers. Contains descriptions of non-fat food solids as "biopolymers" which exhibit physical properties that are highly dependent on temperature, time, and water content Details the effects of water on the state and stability of foods Includes information on changes occurring in state and physicochemical properties during processing and storage The only book on phase and state transitions written specifically for the applications in food industry, product development, and research
Download or read book Evaluation Technologies for Food Quality written by Jian Zhong and published by Woodhead Publishing. This book was released on 2019-04-16 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluation Technologies for Food Quality summarizes food quality evaluation technologies, which include sensory evaluation techniques and chemical and physical analysis. In particular, the book introduces many novel micro and nano evaluation techniques, such as atomic force microscopy, scanning electron microscopy, and other nanomaterial-based methods. All topics cover basic principles, procedures, advantages, limitations, recent technology development, and application progress in different types of foods. This book is a valuable resource for scientists in the field of food science, engineering, and professionals in the food industry, as well as for undergraduate and postgraduate students studying food quality evaluation technology. Explains basic principles, procedures, advantages, limitations, and current applications of recent food quality technologies Provides guidance on the understanding and application of food quality evaluation technology in the field of food research and food industry Introduces many novel micro/nano evaluation techniques, such as atomic force and scanning electron microscopies and other nanomaterial-based methods
Download or read book Polymers with Low Dielectric Constants written by Ejembi Onah and published by . This book was released on 2001 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Poled Polymers and Their Applications to SHG and EO Devices written by Seizo Miyata and published by CRC Press. This book was released on 2020-12-18 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poled polymers doped with nonlinear optically active chromophores combine the large second order nonlinearity of the dopant dye molecules with the optical quality of the polymer. The material design flexibility afforded to doped polymers makes them attractive in a large variety of devices and applications. This book addresses the critical science and technology issues in the development and application of poled polymers, with an emphasis on the stabilization of poled polymers and their special applications to second harmonic generation (SHG) and electro-optic (EO) devices.
Download or read book Crystallization as Studied by Broadband Dielectric Spectroscopy written by Tiberio A. Ezquerra and published by Springer Nature. This book was released on 2020-10-28 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new approaches that offer a better characterization of the interrelationship between crystalline and amorphous phases. In recent years, the use of dielectric spectroscopy has significantly improved our understanding of crystallization. The combination of modern scattering methods, using either synchrotron light or neutrons and infrared spectroscopy with dielectrics, is now helping to reveal modifications of both crystalline and amorphous phases. In turn, this yields insights into the underlying physics of the crystallization process in various materials, e.g. polymers, liquid crystals and diverse liquids. The book offers an excellent introduction to a valuable application of dielectric spectroscopy, and a helpful guide for every scientist who wants to study crystallization processes by means of dielectric spectroscopy.
Download or read book High Electric Field Conduction and Polarization in Polymer Dielectrics written by Zongze Li and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer dielectrics with high energy density are essential elements to fulfill the future needs on pulse power, power conditioning, and electrification applications. The energy density is determined by the breakdown strength and dielectric constant of the polymer dielectrics, essentially controlled by conduction and polarization processes. However, the high field conduction and polarization phenomena of polymer dielectrics with a lack of fundamental understanding are extremely complex involving electronic and conformational structure of polymer, multi-factor interactions from electrical, thermal, mechanical and chemical properties. Thus, the basic experimental and theoretical research on conduction and polarization phenomena of polymer dielectrics under high electric field is a critical enabler to meet the ever-increasing need for high energy density capacitors. In this comprehensive study, the overarching goal is to come up with a satisfactory understanding of high electric field (high field) conduction and polarization phenomena in polymer dielectrics. Characterizations of the conduction and polarization processes in polymer dielectric thin films are presented with a special focus on the relationship between energy storage properties and physical morphology/chemical structures. A novel high electric field conduction measurement system is developed, making prebreakdown conduction measurement through polymer dielectric thin films possible. High field phenomena involving charge instability and charge induced aging are observed for the first. The analysis of the temperature dependent prebreakdown conduction result allows the reconstruction of the defect density of states in the electronic band structures of polymer dielectrics. The result suggests that semi-crystalline polymer films have fundamental advantages over amorphous polymer films with less defect states and shallower trap depth, resulting in a higher breakdown strength. A systematic broadband dielectric spectroscopy measurement is performed with a detailed analysis of individual polarization processes. A design methodology by combining flexible and rigid segments to enhance the sub-glass transition dipolar relaxation is presented for the exploration of novel high energy density polymers. These findings are very insightful for the understanding of high field phenomena in polymers and the essential structure-property relationship to enhance the energy density of polymer dielectrics. This study paves a way to design and optimize polymer dielectrics with high energy density for future pulse power applications.
Download or read book Polymers and Multicomponent Polymeric Systems written by Jose James and published by CRC Press. This book was released on 2019-12-06 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, multicomponent polymers have generated much interest due to their excellent properties, unique morphology and high-end applications. Book focusses on thermal, thermo-mechanical and dielectric analysis of polymers and multicomponent polymeric systems like blends, interpenetrating polymeric networks (IPNs), gels, polymer composites, nanocomposites. Through these analyses, it provides an insight into the stability of polymer systems as a function of time, processing and usage. Aimed at polymer chemists, physicists and engineers, it also covers ASTM /ISO and other standards of various measurement techniques for systematic analysis in materials science.
