Mechanical And Thermophysical Properties Of Polymer Liquid Crystals

Author : Witold Brostow
Publisher : Springer Science & Business Media
Page : 534 pages
File Size : 49,8 Mb
Release : 2013-11-27
Category : Technology & Engineering
ISBN : 9781461557999

Get Book

Mechanical and Thermophysical Properties of Polymer Liquid Crystals by Witold Brostow Pdf

may never overcome the effects of hysteresis and stress (see Chapters 6 and 12). The first sentence of the reference work, Handbook of Liquid Crystals, reads: The terms liquid crystals, crystalline liquid, mesophase, and mesomorphous state are used synonymously to describe a state of aggregation that exhibits a molecular order in a size range similar to that of a crystal but acts more or less as a viscous liquid: [2] In other words, molecules within a liquid crystalline phase possess some orientational order and lack positional order; furthermore, the shape of a liquid crystalline sample is determined by the vessel in which it is contained rather than by the orientational order of its aggregated molecules. The authors recognized the limitations and imprecision of this definition but, like others preceding them, could not devise a simple and generally applicable one that is better. Regardless, the terms 'liquid crystal' and 'mesophase' should not be used interchangeably. As mentioned above, all liquid crystals are mesophases, but all mesophases are not liquid crystals. Recent studies, employing elaborate and sophisticated analytical techniques, have permitted finer distinctions between classical crystals and mesophases. At the same time, they have made definitions like that from the Handbook of Liquid Crystals somewhat obsolete for reasons other than terminology. One part of the problem arises from the use of a combination of bulk properties (like flow) and microscopic properties (like molecular ordering) within the same definition.

Author : Domenico Acierno,A.A. Collyer
Publisher : Springer Science & Business Media
Page : 331 pages
File Size : 40,8 Mb
Release : 2013-11-27
Category : Technology & Engineering
ISBN : 9789400915114

Get Book

Rheology and Processing of Liquid Crystal Polymers by Domenico Acierno,A.A. Collyer Pdf

Liquid crystal polymers (LCPs) have many strange properties that may be utilized to advantage in the processing of products made from them and their blends with isotropic polymers. This volume (volume 2 in the series Polymer Liquid Crystals) deals with their strange flow behaviour and the models put forward to explain the phenomena that occur in such polymers and their blends. It has been known for some time that small ad ditions of a thermotropic LCP to isotropic polymers not only gives an improvement in the strength and stiffness of the blend but improves the processability of the blend over that of the isotropic polymer. In the case of lyotropic LCPs, it is possible to create a molecular composite in which the reinforcement of an isotropic polymer is achieved at a molecular level by the addition of the LCP in a common solvent. If the phenomena can be fully understood both the reinforcement and an increase in the proces sability of isotropic polymers could be optimized. This book is intended to illustrate the current theories associated with the flow of LCPs and their blends in the hope that such an optimization will be achieved by future research. Chapter 1 introduces the subject of LCPs and describes the ter minology used; Chapter 2 then discusses the more complex phenomena associated with these materials. In Chapter 3, the way in which these phe nomena may be modelled using hamiltonians is fully covered.

Author : Johannes Karl Fink
Publisher : William Andrew
Page : 440 pages
File Size : 54,8 Mb
Release : 2014-07-04
Category : Technology & Engineering
ISBN : 9780323311434

Get Book

High Performance Polymers by Johannes Karl Fink Pdf

Approaching the material from a chemistry and engineering perspective, High Performance Polymers presents the most reliable and current data available about state-of-the-art polymerization, fabrication, and application methods of high performance industrial polymers. Chapters are arranged according to the chemical constitution of the individual classes, beginning with main chain carbon-carbon polymers and leading to ether-containing, sulfur-containing, and so on. Each chapter follows an easily readable template, provides a brief overview and history of the polymer, and continues on to such sub-topics as monomers; polymerization and fabrication; properties; fabrication methods; special additives; applications; suppliers and commercial grades; safety; and environmental impact and recycling. High Performance Polymers brings a wealth of up-to-date, high performance polymer data to you library, in a format that allows for either a fast fact-check or more detailed study. In this new edition the data has been fully updated to reflect all developments since 2008, particularly in the topics of monomers, synthesis of polymers, special polymer types, and fields of application. Presents the state-of-the-art polymerization, fabrication and application methods of high performance industrial polymers Provides fundamental information for practicing engineers working in industries that develop advanced applications (including electronics, automotive and medical) Discusses environmental impact and recycling of polymers

Author : George W. Gray,Volkmar Vill,Hans W. Spiess,Dietrich Demus,John W. Goodby
Publisher : John Wiley & Sons
Page : 522 pages
File Size : 47,8 Mb
Release : 2009-08-14
Category : Technology & Engineering
ISBN : 9783527613953

Get Book

Physical Properties of Liquid Crystals by George W. Gray,Volkmar Vill,Hans W. Spiess,Dietrich Demus,John W. Goodby Pdf

This handbook is a unique compendium of knowledge on all aspects of the physics of liquid crystals. In over 500 pages it provides detailed information on the physical properties of liquid crystals as well as the recent theories and results on phase transitions, defects and textures of different types of liquid crystals. An in-depth understanding of the physical fundamentals is a prerequisite for everyone working in the field of liquid crystal research. With this book the experts as well as graduate students entering the field get all the information they need.

Author : Sabu Thomas,Robert Shanks,Sarath Chandran
Publisher : William Andrew
Page : 442 pages
File Size : 49,6 Mb
Release : 2015-09-22
Category : Technology & Engineering
ISBN : 9780323394543

Get Book

Design and Applications of Nanostructured Polymer Blends and Nanocomposite Systems by Sabu Thomas,Robert Shanks,Sarath Chandran Pdf

Design and Applications of Nanostructured Polymer Blend and Nanocomposite Systems offers readers an intelligent, thorough introduction to the design and applications of this new generation of designer polymers with customized properties. The book assembles and covers, in a unified way, the state-of-the-art developments of this less explored type of material. With a focus on nanostructured polymer blends, the book discusses the science of nanostructure formation and the potential performance benefits of nanostructured polymer blends and composites for applications across many sectors: electronics, coatings, adhesives, energy (photovoltaics), aerospace, automotive, and medical devices (biocompatible polymers). The book also describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties. Covers all important information for designing and selecting the right nanostructured polymer system Provides specialized knowledge on self-repairing, nanofibre and nanostructured multiphase materials, as well as evaluation and testing of nanostructured polymer systems Serves as a reference guide for development of new products in industries ranging from electronics, coatings, and energy, to transport and medical applications Describes the design, morphology, and structure of nanostructured polymer composites and blends to achieve specific properties

Author : Visakh P. M.,Semkin A. O.
Publisher : John Wiley & Sons
Page : 402 pages
File Size : 52,9 Mb
Release : 2018-11-30
Category : Technology & Engineering
ISBN : 9781119363880

Get Book

High Performance Polymers and Their Nanocomposites by Visakh P. M.,Semkin A. O. Pdf

“High Performance Polymers and Their Nanocomposites” summarizes many of the recent research accomplishments in the area of high performance polymers, such as: high performance polymers-based nanocomposites, liquid crystal polymers, polyamide 4, 6, polyamideimide, polyacrylamide, polyacrylamide-based composites for different applications, polybenzimidazole, polycyclohexylene dimethyl terephthalate, polyetheretherketone, polyetherimide, polyetherketoneketone, polyethersulfone, polyphenylene sulphide, polyphenylsulfone, polyphthalamide, Polysulfone, self-reinforced polyphenylene, thermoplastic polyimide.

Author : Shri Singh
Publisher : Springer Nature
Page : 578 pages
File Size : 50,5 Mb
Release : 2024-06-07
Category : Electronic
ISBN : 9783031500589

Get Book

Handbook of Liquid Crystals—Volume I by Shri Singh Pdf

Author : James E. Mark
Publisher : Springer Science & Business Media
Page : 1050 pages
File Size : 41,9 Mb
Release : 2007-03-21
Category : Technology & Engineering
ISBN : 9780387690025

Get Book

Physical Properties of Polymers Handbook by James E. Mark Pdf

This book offers concise information on the properties of polymeric materials, particularly those most relevant to physical chemistry and chemical physics. Extensive updates and revisions to each chapter include eleven new chapters on novel polymeric structures, reinforcing phases in polymers, and experiments on single polymer chains. The study of complex materials is highly interdisciplinary, and new findings are scattered among a large selection of scientific and engineering journals. This book brings together data from experts in the different disciplines contributing to the rapidly growing area of polymers and complex materials.

Author : George P. Simon
Publisher : Routledge
Page : 865 pages
File Size : 54,9 Mb
Release : 2019-07-16
Category : Technology & Engineering
ISBN : 9781351423618

Get Book

Polymer Blends and Alloys by George P. Simon Pdf

Distinguishing among blends, alloys and other types of combinations, clarifying terminology and presenting data on new processes and materials, this work present up-to-date and effective compounding techniques for polymers. It offers extensive analyses on the challenging questions that surround miscibility, compatibility, dynamic processing, interaction/phase behaviour, and computer simulations for predicting behaviours of polymer mixture and interaction.

Author : A. M. Donald,A. H. Windle,S. Hanna
Publisher : Cambridge University Press
Page : 616 pages
File Size : 53,6 Mb
Release : 2006-05-11
Category : Science
ISBN : 0521580013

Get Book

Liquid Crystalline Polymers by A. M. Donald,A. H. Windle,S. Hanna Pdf

A 2006 edition explaining the underlying science and applications of liquid crystalline polymers.

Author : Freddy Yin Chiang Boey,K A Khor,Tirumalai S Srivatsan,M Wang,W Zhou
Publisher : World Scientific
Page : 1080 pages
File Size : 52,8 Mb
Release : 2001-01-19
Category : Technology & Engineering
ISBN : 9789814491372

Get Book

Processing And Fabrication Of Advanced Materials Viii by Freddy Yin Chiang Boey,K A Khor,Tirumalai S Srivatsan,M Wang,W Zhou Pdf

This volume contains the technical papers presented at the international symposium entitled “Processing and Fabrication of Advanced Materials VIII”, held in Singapore in 1999. This was the eighth in a series of symposia bringing together engineers and researchers from industry, academia and national laboratories, working on aspects related to the processing, fabrication and characterization of advanced materials, to present and discuss their latest findings. The proceedings also contain technical papers presented at two special symposia on biomaterials and magnesium technology.

Author : P. M. Visakh,Artem Semkin,Zeynep Guven Ozdemir
Publisher : Woodhead Publishing
Page : 306 pages
File Size : 53,5 Mb
Release : 2022-01-06
Category : Technology & Engineering
ISBN : 9780128221631

Get Book

Liquid Crystal Polymer Nanocomposites by P. M. Visakh,Artem Semkin,Zeynep Guven Ozdemir Pdf

Liquid Crystal Polymer Nanocomposites summarizes, in a comprehensive manner, numerous modern technical research accomplishments on the development of nanocomposites from liquid crystalline polymers. It emphasizes various studies at the nano-scale, including discussions of liquid crystalline block copolymers, liquid crystalline epoxy nanocomposites, barrier property studies of liquid crystalline epoxy and their nanocomposites, liquid crystalline polymer-based microfibrillar and nanofibrillar composites, liquid crystalline polymer/nanoplatelet nanocomposites, liquid-crystalline elastomer/graphene oxide nanocomposites, and thermotropic liquid crystalline polymers. It provides detailed information on methods of preparation, the properties of these materials and a discussion on the structure-properties relationship. With an emphasis on data and experimental results, the book's authors illustrate how the liquid crystal structure can have an impact on the final properties of nanocomposite. Contains contributions from leading experts working in this specialized field of research Provides detailed information on the preparation, characterization and application of nanocomposites of liquid crystalline polymers Presents solutions to both fundamental and applied problems

Author : Tai-Shung Chung
Publisher : CRC Press
Page : 392 pages
File Size : 48,8 Mb
Release : 2001-03-01
Category : Technology & Engineering
ISBN : 1420012525

Get Book

Thermotropic Liquid Crystal Polymers by Tai-Shung Chung Pdf

Liquid crystal polymers are sometimes called super polymers--with good reason. Their wide range of exceptional properties and ease of processing make them design candidates for many demanding applications. This new book provides a thorough review of LCP technology with the emphasis on the chemistry, synthesis and characterization of the material in its many variants. Additional chapters cover processing and applications. From the Editor's Preface The field of thermotropic liquid crystalline polymers has grown substantially in the last two decades, with fundamental research, publications, commercial products, and patents. In the 1980's, Dr. Ralph Miano led my colleagues and me at Hoechst Celanese in commercializing the first thermotropic liquid crystalline polymers, based on Dr. Gordon Calundann's composition patents. Today, more than seven companies have produced thermotropic liquid crystalline polymer materials, with at least 50 variants available. Hence, it is timely to compile a comprehensive review on the nature of this type of material and the ongoing progress in this field.... The goals of this book are to summarize previous work, provide new insights into this class of polymers, and add to the understanding of the formation of liquid crystallinity. This book covers a wide range of topics and addresses different disciplines in the field. The chapters are arranged as a learning scheme for the professional, from basic science to applied engineering. The first few chapters summarize the syntheses of various polyester, polyester-amid, and polyimide liquid crystalline polymers. The science and origins of liquid crystal formation are revealed. Next, we introduce the characterizations of these materials by their different chemical and physical aspects. Because most commercially available thermotropic liquid crystalline polymers have been used in the form of composites, we have also incorporated a chapter on polymer blends, detailing blending mechanisms and resultant properties. Two chapters on thermosetting liquid crystalline polymers integrate them with other topics, because of their unique importance and their applications for microelectronics and packaging. The final chapter deals with the engineering and processing aspects of thermoplastic liquid crystalline polymers for a variety of applications.

Author : Xin-jiu Wang,Qi-feng Zhou
Publisher : World Scientific Publishing Company
Page : 388 pages
File Size : 44,6 Mb
Release : 2004-04-14
Category : Technology & Engineering
ISBN : 9789813106161

Get Book

Liquid Crystalline Polymers by Xin-jiu Wang,Qi-feng Zhou Pdf

This textbook consists of six chapters. The first chapter highlights the concept of liquid crystals, including chemical structure, phase classification, defect and texture, and continuum theory. It has been carefully written to meet the needs of readers who do not specialize in liquid crystals. The second chapter is related to the theoretical description of liquid crystalline polymers, networks, and gels, which deals with subjects such as the formation of liquid crystallinity in the polymer system, the phase transition and phase diagram, the molecular weight effect, chain conformation, physics properties, etc. In Chapter 3, the molecular engineering of liquid crystalline polymers is introduced. The molecular composition and the molecular weight play essential roles in the molecular design, which are reviewed in detail. In addition, some unusual liquid crystalline polymers are discussed. Chapter 4 is devoted to the phase identification of liquid crystalline polymers. The techniques involved cover polarizing microscopy, thermal analysis, X-ray diffraction, and other areas. Chapters 5 and 6 summarize the properties and applications of liquid crystalline polymers: Chapter 5 deals mainly with mechanical performance in fiber and composites; Chapter 6 presents the elasticity, viscosity and rheology of liquid crystalline polymers, as well as other important properties.

Author : Anonim
Publisher : Newnes
Page : 7752 pages
File Size : 45,6 Mb
Release : 2012-12-05
Category : Technology & Engineering
ISBN : 9780080878621

Get Book

Polymer Science: A Comprehensive Reference by Anonim Pdf

The progress in polymer science is revealed in the chapters of Polymer Science: A Comprehensive Reference, Ten Volume Set. In Volume 1, this is reflected in the improved understanding of the properties of polymers in solution, in bulk and in confined situations such as in thin films. Volume 2 addresses new characterization techniques, such as high resolution optical microscopy, scanning probe microscopy and other procedures for surface and interface characterization. Volume 3 presents the great progress achieved in precise synthetic polymerization techniques for vinyl monomers to control macromolecular architecture: the development of metallocene and post-metallocene catalysis for olefin polymerization, new ionic polymerization procedures, and atom transfer radical polymerization, nitroxide mediated polymerization, and reversible addition-fragmentation chain transfer systems as the most often used controlled/living radical polymerization methods. Volume 4 is devoted to kinetics, mechanisms and applications of ring opening polymerization of heterocyclic monomers and cycloolefins (ROMP), as well as to various less common polymerization techniques. Polycondensation and non-chain polymerizations, including dendrimer synthesis and various "click" procedures, are covered in Volume 5. Volume 6 focuses on several aspects of controlled macromolecular architectures and soft nano-objects including hybrids and bioconjugates. Many of the achievements would have not been possible without new characterization techniques like AFM that allowed direct imaging of single molecules and nano-objects with a precision available only recently. An entirely new aspect in polymer science is based on the combination of bottom-up methods such as polymer synthesis and molecularly programmed self-assembly with top-down structuring such as lithography and surface templating, as presented in Volume 7. It encompasses polymer and nanoparticle assembly in bulk and under confined conditions or influenced by an external field, including thin films, inorganic-organic hybrids, or nanofibers. Volume 8 expands these concepts focusing on applications in advanced technologies, e.g. in electronic industry and centers on combination with top down approach and functional properties like conductivity. Another type of functionality that is of rapidly increasing importance in polymer science is introduced in volume 9. It deals with various aspects of polymers in biology and medicine, including the response of living cells and tissue to the contact with biofunctional particles and surfaces. The last volume is devoted to the scope and potential provided by environmentally benign and green polymers, as well as energy-related polymers. They discuss new technologies needed for a sustainable economy in our world of limited resources. Provides broad and in-depth coverage of all aspects of polymer science from synthesis/polymerization, properties, and characterization methods and techniques to nanostructures, sustainability and energy, and biomedical uses of polymers Provides a definitive source for those entering or researching in this area by integrating the multidisciplinary aspects of the science into one unique, up-to-date reference work Electronic version has complete cross-referencing and multi-media components Volume editors are world experts in their field (including a Nobel Prize winner)