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In Situ X Ray Scattering Measurements Of Orientation In Channel Flows Of Liquid Crystalline Polymers
Download In Situ X Ray Scattering Measurements Of Orientation In Channel Flows Of Liquid Crystalline Polymers full books in PDF, epub, and Kindle. Read online In Situ X Ray Scattering Measurements Of Orientation In Channel Flows Of Liquid Crystalline Polymers ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis In Situ X-ray Scattering Measurements of Orientation in Channel Flows of Liquid Crystalline Polymers by : David K. Cinader
Download or read book In Situ X-ray Scattering Measurements of Orientation in Channel Flows of Liquid Crystalline Polymers written by David K. Cinader and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Effect of Shear Flow on Molecular Orientation in Model Thermotropic Liquid Crystalline Polymers Using in Situ X-ray Scattering by : Victor Manuel Ugaz
Download or read book Investigation of the Effect of Shear Flow on Molecular Orientation in Model Thermotropic Liquid Crystalline Polymers Using in Situ X-ray Scattering written by Victor Manuel Ugaz and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Although liquid crystalline polymers (LCPs) offer considerable commercial potential for the production of lightweight materials possessing exceptional mechanical strength, the influence of flow on molecular orientation remains poorly understood in melt processable thermotropic systems. In this thesis, a combination of materials and experimental techniques are employed which allow structural measurements to be obtained under a variety of flow conditions in the melt. In situ x-ray scattering techniques are used as a structural probe to directly measure the influence of flow on molecular orientation, and to identify the presence of other structural arrangements which would otherwise be unobservable. First, we use this structural data to identify a link between the development of a hexagonal microstructure and the onset of region I shear thinning in lyotropic poly(gamma-benzyl-L-glutamate) in m-cresol. Next, two different model thermotropic systems are studied, a polyester and polyether respectively, which incorporate molecular architectures specifically designed to provide a stable nematic phase over a wide temperature range. We present measurements of molecular orientation in steady shear flow, during relaxation after cessation of shear flow, and in the transient periods during shear flow inception and reversal. Under certain combinations of temperature and shear rate, the polyether is found to display a dramatic transition in molecular alignment to a condition where orientation is favored parallel to the vorticity direction, rather than parallel to the flow direction as is typically observed. Both materials exhibit dynamic behavior in the nematic phase consistent with flow alignment, as opposed to director tumbling behavior which is often observed in lyotropic LCPs. This hypothesis is supported by comparison with an adaptation of the Ericksen transversely isotropic fluid model and the Larson-Doi model, both of which account for the polydomain texture characteristic of LCP materials. The Larson-Doi model yields better qualitative predictions of the evolution of orientation and stress during flow reversal, suggesting that distortional elasticity plays a significant role in this type of flow. However, some discrepancies remain between the model predictions and the experimentally observed behavior, suggesting that distortional elasticity may play a different role in the rheology of thermotropic LCPs than in lyotropes.
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:
Book Synopsis Scattering from Polymers by : Peggy Cebe
Download or read book Scattering from Polymers written by Peggy Cebe and published by . This book was released on 2000 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reflects the recent progress made in the field of scattering in polymers. A wide range of scattering studies on different polymer systems, including block copolymers, semicrystalline polymers, complex fluids, multicomponent systems, polymeric surfaces, and polymer processing are included, as well as new experimental techniques and theoretical treatments. This volume provides a comprehensive reference for those researchers who need to know how scattering techniques can be used to tackle different polymer problems, and is ideal for graduate polymer scientists studying scattering techniques.
Book Synopsis Understanding the Molecular Orientation of a Flow Aligning Thermotropic Liquid Crystalline Polymer Using X-ray and Neutron Scattering Techniques by : Nitin Vaish
Download or read book Understanding the Molecular Orientation of a Flow Aligning Thermotropic Liquid Crystalline Polymer Using X-ray and Neutron Scattering Techniques written by Nitin Vaish and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Directory of Graduate Research by : American Chemical Society. Committee on Professional Training
Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 2005 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Synchrotron X-ray Diffraction to Characterize Natural and Synthetic Liquid Crystalline Polymers by : Scott Guthrie McNamee
Download or read book The Use of Synchrotron X-ray Diffraction to Characterize Natural and Synthetic Liquid Crystalline Polymers written by Scott Guthrie McNamee and published by . This book was released on 1994 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics of Polymers by : Gert R. Strobl
Download or read book The Physics of Polymers written by Gert R. Strobl and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer physics is one of the key courses not only in polymer science but also in material science. In his textbook Strobl presents the elements of polymer physics to the necessary extent in a very didactical way. His main focus is on the concepts and major phenomena of polymer physics, not just on mere physical methods. He has written the book in a personal style evaluating the concepts he is dealing with. Every student in polymer and materials science will be happy to have it on his shelf.
Book Synopsis Time-dependence of Crystal Orientation in Crystalline Polymers by : R. S. Stein
Download or read book Time-dependence of Crystal Orientation in Crystalline Polymers written by R. S. Stein and published by . This book was released on 1967 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of two methods for studying molecular processes accompanying the deformation of polyethylene are described. The examination of spherulite deformation by observing light scattering patterns along with measurement of the birefringence, stress and strain during the rapid extension of polyethylene shows that this initial structural deformation is essentially instantaneous. Dynamic x-ray diffraction shows that this is followed by a slower relaxation involving change in the orientation of the crystals by two processes, the lower temperature one involving slipping of lamellae past each other and the higher temperature one involving viscoelastic flow of the crystals. (Author).
Book Synopsis X-Ray Scattering of Soft Matter by : Norbert Stribeck
Download or read book X-Ray Scattering of Soft Matter written by Norbert Stribeck and published by Springer Science & Business Media. This book was released on 2007-05-16 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual is a useful ready-reference guide to the analytical power of modern X-ray scattering in the field of soft matter. The author describes simple tools that can elucidate the mechanisms of structure evolution in the studied materials, and follows this up with a step-by-step guide to more advanced methods. Data analysis based on clear, unequivocal results is rendered simple and straightforward – with a stress on careful planning of experiments and adequate recording of all required data.
Book Synopsis Liquid Cell Electron Microscopy by : Frances M. Ross
Download or read book Liquid Cell Electron Microscopy written by Frances M. Ross and published by Cambridge University Press. This book was released on 2017 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2.6.2 Electrodes for Electrochemistry
Book Synopsis Chirality in Liquid Crystals by : Heinz Kitzerow
Download or read book Chirality in Liquid Crystals written by Heinz Kitzerow and published by Springer Science & Business Media. This book was released on 2001 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the main aspects of chirality in liquid crystals, and points out some of the open questions of current research. The chapters review the highlights of the important topics and questions.
Book Synopsis Soft-Matter Characterization by : Redouane Borsali
Download or read book Soft-Matter Characterization written by Redouane Borsali and published by Springer Science & Business Media. This book was released on 2008-07-28 with total page 1490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2-volume set includes extensive discussions of scattering techniques (light, neutron and X-ray) and related fluctuation and grating techniques that are at the forefront of this field. Most of the scattering techniques are Fourier space techniques. Recent advances have seen the development of powerful direct imaging methods such as atomic force microscopy and scanning probe microscopy. In addition, techniques that can be used to manipulate soft matter on the nanometer scale are also in rapid development. These include the scanning probe microscopy technique mentioned above as well as optical and magnetic tweezers.
Download or read book Polymer Morphology written by Qipeng Guo and published by John Wiley & Sons. This book was released on 2016-05-16 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a focus on structure-property relationships, this book describes how polymer morphology affects properties and how scientists can modify them. The book covers structure development, theory, simulation, and processing; and discusses a broad range of techniques and methods. • Provides an up-to-date, comprehensive introduction to the principles and practices of polymer morphology • Illustrates major structure types, such as semicrystalline morphology, surface-induced polymer crystallization, phase separation, self-assembly, deformation, and surface topography • Covers a variety of polymers, such as homopolymers, block copolymers, polymer thin films, polymer blends, and polymer nanocomposites • Discusses a broad range of advanced and novel techniques and methods, like x-ray diffraction, thermal analysis, and electron microscopy and their applications in the morphology of polymer materials
Book Synopsis X-Ray Diffraction Crystallography by : Yoshio Waseda
Download or read book X-Ray Diffraction Crystallography written by Yoshio Waseda and published by Springer Science & Business Media. This book was released on 2011-03-18 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray diffraction crystallography for powder samples is a well-established and widely used method. It is applied to materials characterization to reveal the atomic scale structure of various substances in a variety of states. The book deals with fundamental properties of X-rays, geometry analysis of crystals, X-ray scattering and diffraction in polycrystalline samples and its application to the determination of the crystal structure. The reciprocal lattice and integrated diffraction intensity from crystals and symmetry analysis of crystals are explained. To learn the method of X-ray diffraction crystallography well and to be able to cope with the given subject, a certain number of exercises is presented in the book to calculate specific values for typical examples. This is particularly important for beginners in X-ray diffraction crystallography. One aim of this book is to offer guidance to solving the problems of 90 typical substances. For further convenience, 100 supplementary exercises are also provided with solutions. Some essential points with basic equations are summarized in each chapter, together with some relevant physical constants and the atomic scattering factors of the elements.
