Processing, Structure and Property Relationships in Commercial Thermotropic Liquid Crystalline Polymers

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Total Pages : pages
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Book Synopsis Processing, Structure and Property Relationships in Commercial Thermotropic Liquid Crystalline Polymers by : Stanley Rendon

Download or read book Processing, Structure and Property Relationships in Commercial Thermotropic Liquid Crystalline Polymers written by Stanley Rendon and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermotropic liquid crystalline polymers (TLCPs) offer considerable promise as high strength/lightweight engineering materials. Their excellent mechanical properties are derived from the spontaneous ordering of stiff polymer molecules in the melt state, which is ultimately translated into high molecular orientation in finished products. Understanding the effect of processing on molecular orientation, and specifically the role and mechanisms by which flow fields impact molecular orientation, is thus a prerequisite to rational design of processes that exploit and enhance the characteristics of TLCPs. The lack of fundamental knowledge to rationally anticipate structure development during processing of commercial main-chain TLCPs however, has significantly hindered the wide spread applicability of these materials. In light of the need for improved understanding of flow-orientation relationships in TLCPs, this thesis presents the first coordinated attempt to combine fundamental studies of orientation development in well-defined simple flows (simple shear) and complex processing flows (extrusion and injection molding) using in situ x-ray scattering methods, with structure and property investigations of injection molded plaques made from commercial TLCPs.

Relationships Between Molecular Aggregation Structures and Gas Permeation Properties of Thermotropic Liquid Crystalline Polymers

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 ( download)

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Book Synopsis Relationships Between Molecular Aggregation Structures and Gas Permeation Properties of Thermotropic Liquid Crystalline Polymers by : T. Kajiyama

Download or read book Relationships Between Molecular Aggregation Structures and Gas Permeation Properties of Thermotropic Liquid Crystalline Polymers written by T. Kajiyama and published by . This book was released on 1986 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Rheology and Processing of Liquid Crystal Polymers

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Publisher : Springer Science & Business Media
ISBN 13 : 940091511X
Total Pages : 331 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Rheology and Processing of Liquid Crystal Polymers by : Domenico Acierno

Download or read book Rheology and Processing of Liquid Crystal Polymers written by Domenico Acierno and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Processing and Properties of Liquid Crystalline Polymers and LCP Based Blends

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Publisher : ChemTec Publishing
ISBN 13 : 1895198046
Total Pages : 227 pages
Book Rating : 4.8/5 (951 download)

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Book Synopsis Processing and Properties of Liquid Crystalline Polymers and LCP Based Blends by : Domenico Acierno

Download or read book Processing and Properties of Liquid Crystalline Polymers and LCP Based Blends written by Domenico Acierno and published by ChemTec Publishing. This book was released on 1993 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some papers in this book report on the most recent developments in pure liquid crystalline polymers showing that discipline is dynamic and may offer in the future numerous other opportunities not known today. We hope that our selections of papers will be interesting for specialists in polymer chemistry, blends, and their industrial application, and that information included in this book will be stimulating and will favorably impact research currently performed by the readers of this book.

Activity report

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ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Activity report by : Brookhaven National Laboratory. National Synchrotron Light Source

Download or read book Activity report written by Brookhaven National Laboratory. National Synchrotron Light Source and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Structure-property Relations in Liquid Crystalline and Thermoplastic Polymers

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ISBN 13 :
Total Pages : 674 pages
Book Rating : 4.:/5 (346 download)

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Book Synopsis Structure-property Relations in Liquid Crystalline and Thermoplastic Polymers by : Derrick Resha Dean

Download or read book Structure-property Relations in Liquid Crystalline and Thermoplastic Polymers written by Derrick Resha Dean and published by . This book was released on 1994 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: The crystal structure and morphology of a family of aromatic-aliphatic azomethine polyethers (where the aliphatic unit was composed of CH$sb2$ units ranging in length from n = 1, 4, 7, 8, 9 and 10) has been examined primarily by Electron microscopy(EM) and Electron diffraction(ED). Chain folded single crystals with lamellar thicknesses of 35-100A, in which the molecular axis is perpendicular to the substrate, have been grown by slow cooling thin films from the nematic state on a glycerin surface for n = 4, 8 and 10 with AZMEP-7 yielding disclination domains with isolated regions of chain folded lamellae. For as-polymerized AZMEP-10, the lamellae were found to be 35A thick The thinness of the lamellae and their tilt relative to the substrate and molecular axis suggests a regular, adjacent re-entry type folding every three repeat distances. AZMEP-1 was found to crystallize as striated films of near uniform thickness; in these samples, the molecular axes are parallel to the substrate, yielding fiber-type ED patterns. AZMEP-9 samples yielded a similar morphology, but no ED patterns were obtained. Our findings on samples crystallized as thin films has added to earlier findings by S. Kent and P. H. Geil, which gave the first conclusive evidence of chain folding in lcps. Claims were also made by them, and is supported by our findings, of the presence of chain folding in the nematic state. Sheared samples with lamellae ca. 250A and more or less perpendicular to the shear direction have been obtained for n = 1, 4, 7, 8, 9 and 10. Annealing below T$rmsb{k-m}$ has been shown to increase the lamellar thickness and overall order. ED from sheared, annealed samples surprisingly yield h01 single crystal patterns rather than the expected fiber patterns, which have rotational symmetry. This finding is unique, as far as we know, for sheared polymer samples. The h01 single crystal nature of these samples was verified by dark field EM. Lamellar single crystals (ca. 100A thick) have been grown by the constrained film melt polymerization technique for n = 4, 8 and 9, yielding single crystals suitable for ED. The ED data from these samples, in conjunction with data obtained from the sheared samples, has permitted characterization of the unit cells. We have examined creep above and below the nominal Tg in both the viscoelastic and viscoplastic load ranges for AS4/J1 uniaxial composites. Surprisingly, long term creep in tension does not appear to be a problem; it was found to be compensated by shrinkage due to physical aging, resulting in negative creep in the viscoelastic load range, and near zero creep in the viscoplastic load range. This fact makes the time-temperature superposition principle invalid for long term predictions; it actually overpredicts it in tension. The fact that physical aging occurs above Tg in subcrystalline polymers is attributed to the presence of a distributed Tg.

Dissertation Abstracts International

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ISBN 13 :
Total Pages : 886 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Liquid Crystalline Polymers

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Publisher : Springer
ISBN 13 : 3319202707
Total Pages : 536 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Liquid Crystalline Polymers by : Vijay Kumar Thakur

Download or read book Liquid Crystalline Polymers written by Vijay Kumar Thakur and published by Springer. This book was released on 2015-08-25 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces various applications of liquid crystalline polymers as the emerging new class of high performance novel materials. The authors detail the advantageous properties of these LCs including optical anisotropic, transparency and easy control over structure. This interdisciplinary work includes valuable input from international projects with special focus on the use of liquid crystalline polymers and/or nanocomposites.

High Temperature Polymer Blends

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Publisher : Elsevier
ISBN 13 : 0857099019
Total Pages : 233 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis High Temperature Polymer Blends by : Mark T. DeMeuse

Download or read book High Temperature Polymer Blends written by Mark T. DeMeuse and published by Elsevier. This book was released on 2014-03-25 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer blends offer properties not easily obtained through the use of a single polymer, including the ability to withstand high temperatures. High Temperature Polymer Blends outlines the characteristics, developments, and use of high temperature polymer blends. The first chapter introduces high temperature polymer blends, their general principles, and thermodynamics. Further chapters go on to deal with the characterization of high temperature polymer blends for specific uses, such as fuel cells and aerospace applications. The book discusses different types of high temperature polymer blends, including liquid crystal polymers, polysulfones, and polybenzimidazole polymer blends and their commercial applications. High Temperature Polymer Blends provides a key reference for material scientists, polymer scientists, chemists, and plastic engineers, as well as academics in these fields. Reviews characterization methods and analysis of the thermodynamic properties of high temperature polymer blends Reviews the use of materials such as liquid crystals as reinforcements as well as applications in such areas as energy and aerospace engineering

Structure-property Relations of a Liquid Crystalline Polymer and Attempts Toward an Oligomer Model

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ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (117 download)

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Book Synopsis Structure-property Relations of a Liquid Crystalline Polymer and Attempts Toward an Oligomer Model by : Melissa Kay Thomas

Download or read book Structure-property Relations of a Liquid Crystalline Polymer and Attempts Toward an Oligomer Model written by Melissa Kay Thomas and published by . This book was released on 1983 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Liquid Crystalline Polymers

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Publisher : Springer
ISBN 13 : 9783030433499
Total Pages : 0 pages
Book Rating : 4.4/5 (334 download)

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Book Synopsis Liquid Crystalline Polymers by : Lei Zhu

Download or read book Liquid Crystalline Polymers written by Lei Zhu and published by Springer. This book was released on 2020-08-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of various self-assemblies in liquid crystalline polymers and their electrical, optical, mechanical, and flame retardant properties. Liquid crystalline polymers are unique self-assembled, functional soft materials with electrical, magnetic, and thermal responses which find potential applications in numerous areas. As well as providing an overview of their synthesis, self-assembly and dynamics the various applications are also discussed. Such applications as liquid crystalline elastomers, light responsive actuators, optical reflectors, gas barrier films, and even flame retardant polymers will be presented. The book is a useful resource for undergraduates, postgraduates and experienced researchers.

Side Chain Liquid Crystal Polymers

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Publisher : Springer Science & Business Media
ISBN 13 : 9780216925038
Total Pages : 474 pages
Book Rating : 4.9/5 (25 download)

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Book Synopsis Side Chain Liquid Crystal Polymers by : C.B. McArdle

Download or read book Side Chain Liquid Crystal Polymers written by C.B. McArdle and published by Springer Science & Business Media. This book was released on 1990-04-30 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Structure-property Relationships in Non-conventional Liquid Crystalline Materials

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ISBN 13 :
Total Pages : 624 pages
Book Rating : 4.:/5 (593 download)

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Book Synopsis Structure-property Relationships in Non-conventional Liquid Crystalline Materials by : Andrew G. Cook

Download or read book Structure-property Relationships in Non-conventional Liquid Crystalline Materials written by Andrew G. Cook and published by . This book was released on 2001 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Research in Progress

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ISBN 13 :
Total Pages : 302 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Research in Progress by :

Download or read book Research in Progress written by and published by . This book was released on 1992 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Polymer Science and Engineering

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Publisher : National Academies Press
ISBN 13 : 0309049989
Total Pages : 193 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Polymer Science and Engineering by : National Research Council

Download or read book Polymer Science and Engineering written by National Research Council and published by National Academies Press. This book was released on 1994-01-01 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are used in everything from nylon stockings to commercial aircraft to artificial heart valves, and they have a key role in addressing international competitiveness and other national issues. Polymer Science and Engineering explores the universe of polymers, describing their properties and wide-ranging potential, and presents the state of the science, with a hard look at downward trends in research support. Leading experts offer findings, recommendations, and research directions. Lively vignettes provide snapshots of polymers in everyday applications. The volume includes an overview of the use of polymers in such fields as medicine and biotechnology, information and communication, housing and construction, energy and transportation, national defense, and environmental protection. The committee looks at the various classes of polymersâ€"plastics, fibers, composites, and other materials, as well as polymers used as membranes and coatingsâ€"and how their composition and specific methods of processing result in unparalleled usefulness. The reader can also learn the science behind the technology, including efforts to model polymer synthesis after nature's methods, and breakthroughs in characterizing polymer properties needed for twenty-first-century applications. This informative volume will be important to chemists, engineers, materials scientists, researchers, industrialists, and policymakers interested in the role of polymers, as well as to science and engineering educators and students.

Polymer Science: A Comprehensive Reference

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Publisher : Newnes
ISBN 13 : 0080878628
Total Pages : 7752 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Polymer Science: A Comprehensive Reference by :

Download or read book Polymer Science: A Comprehensive Reference written by and published by Newnes. This book was released on 2012-12-05 with total page 7752 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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)

Book of Abstracts

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ISBN 13 :
Total Pages : 1398 pages
Book Rating : 4.:/5 (44 download)

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Book Synopsis Book of Abstracts by : American Chemical Society. Meeting

Download or read book Book of Abstracts written by American Chemical Society. Meeting and published by . This book was released on 1985 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt: