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Crystalline Defects And Deformation Mechanisms In Semi Crystalline Polymers
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Book Synopsis Crystalline Defects and Deformation Mechanisms in Semi-Crystalline Polymers by : A. Hunter
Download or read book Crystalline Defects and Deformation Mechanisms in Semi-Crystalline Polymers written by A. Hunter and published by . This book was released on 1982 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructure and subsequent mechanisms of deformation in polyethylene spherulites is very dependent on the method of spherulitic film preparation. Slowly cooled spherulites have been previously investigated in detail by transmission electron microscopy and diffraction, whereas the present work has been primarily concerned with the reproducible preparation of rapidly cooled high density polyethylene films which exihibit a banded spherulite morphology. Techniques for the preparation of deformed thin polyethylene films and their subsequent examination by scanning transmission electron microscopy and diffraction have been developed. Fine differences in the spherulite morphology have been identified, as have the differences between the operative deformation mechanisms in rapidly and slowly cooled spherulitic films. (Author).
Book Synopsis An Experimental Study of Deformation Mechanisms and Resistances of Semi-crystalline Polymers by : Li Lin
Download or read book An Experimental Study of Deformation Mechanisms and Resistances of Semi-crystalline Polymers written by Li Lin and published by . This book was released on 1991 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deformation Mechanisms in an Oriented Semicrystalline Polymer by : Thomas Harry Gilman
Download or read book Deformation Mechanisms in an Oriented Semicrystalline Polymer written by Thomas Harry Gilman and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Introduction to Composite Materials by : D. Hull
Download or read book An Introduction to Composite Materials written by D. Hull and published by Cambridge University Press. This book was released on 1996-08-13 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition has been greatly enlarged and updated to provide both scientists and engineers with a clear and comprehensive understanding of composite materials. In describing both theoretical and practical aspects of their production, properties and usage, the book crosses the borders of many disciplines. Topics covered include: fibres, matrices, laminates and interfaces; elastic deformation, stress and strain, strength, fatigue crack propagation and creep resistance; toughness and thermal properties; fatigue and deterioration under environmental conditions; fabrication and applications. Coverage has been increased to include polymeric, metallic and ceramic matrices and reinforcement in the form of long fibres, short fibres and particles. Designed primarily as a teaching text for final-year undergraduates in materials science and engineering, this book will also interest undergraduates and postgraduates in chemistry, physics, and mechanical engineering. In addition, it will be an excellent source book for academic and technological researchers on materials.
Book Synopsis The Physics of Deformation and Fracture of Polymers by : A. S. Argon
Download or read book The Physics of Deformation and Fracture of Polymers written by A. S. Argon and published by Cambridge University Press. This book was released on 2013-03-07 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: A physical, mechanism-based presentation of the plasticity and fracture of polymers, covering industrial scale applications through to nanoscale biofluidic devices.
Book Synopsis Deformation Mechanisms in Crystalline Polymers by : R. J. Young
Download or read book Deformation Mechanisms in Crystalline Polymers written by R. J. Young and published by . This book was released on 1972 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damage Mechanisms Under Tensile Stress of Amorphous and Low Semi-crystalline Polymers by : Stéphanie Djukic
Download or read book Damage Mechanisms Under Tensile Stress of Amorphous and Low Semi-crystalline Polymers written by Stéphanie Djukic and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few years, a new class of polyamides has been developed for specific applications requiring better mechanical and thermal properties, such as electronics or automotive industry. Polyphthalamides (PPA) are semi-aromatic polyamides containing aromatic rings in their main chain. Recently, the damage mechanisms have been studied in the case of semi-crystalline (PA66) and amorphous (cellulose acetate) polymers. The aim of the PhD thesis was to study the damage mechanisms of amorphous and semi-crystalline polymers. In addition, few studies have been conducted to characterize the properties of pure PPA. More detailed data regarding their mechanical properties are needed. The study of the properties of this class of polymers is important, especially since their applications are different from aliphatic polyamides. We first characterized these polymers and then studied their mechanical behavior in traction, compression and Charpy impact strength. We have thus been able to highlight the appearance of a necking phenomenon and a strain hardening regime from 20% deformation for three PPA studied. Strain hardening has also been observed in other amorphous ductile polymers such as polycarbonate (PC) or poly(methyl methacrylate) (PMMA). The strain hardening stabilizes the deformation by avoiding the localization of the damage. In order to describe the microscopic mechanisms associated with the initiation and propagation of damage under tensile deformation of our polymers, we have carried out observations by scanning transmission electron microscopy (STEM) and optical microscopy as well as by Ultra-small angle X-ray scattering (USAXS). The analysis of these different polymers (amorphous and semi-crystalline PPA, PC, PMMA) by USAXS highlights different modes of damage. The simultaneous nucleation of nanometric crazes around the pre-existing defects (defects related to the injection process), then the limited growth of these crazes are observed for the amorphous PPA, the PC and the PMMA studied, in a mechanism similar to that studied in the case of cellulose acetate. The damage is blocked in the first place by the strain hardening. However, in the case of polycarbonate and PMMA, when the stress applied becomes sufficiently high, a small fraction of these crazes grows faster to cause the rupture of the sample, which allows to observe the evolution of a second family of larger crazes. We also observe the growth of a second family of crazes for one of the amorphous PPA, but their growth stops at the appearance of necking. No failure of the sample is observed. The second amorphous PPA is damaged by cavitation up to about 5% deformation. The cavities stop to grow at the appearance of shear bands. When the shear bands propagated on either side of the sample, the failure is observed. The two semi-crystalline PPA deform by necking without failure. No cavitation was observed by USAXS. The damage of the polymers studied can be classified into three categories. The first category concerns polymers that behave similarly to cellulose acetate. Crazing nucleation is observed, which growth is initially blocked by strain hardening. When the stress applied becomes sufficiently high, a fraction of these crazes increases more rapidly until the sample is broken, which makes it possible to observe the evolution of a second family of larger crazes. This category concerns polycarbonate and PMMA. The second category concerns one of the amorphous PPA with crazes whose growth is initially blocked also by strain hardening. The growth of a second family of crazes stops at the appearance of necking, and no failure of the specimen is observed. The last category concerns polymers that do not show any damage. These are the two semi-crystalline PPA. We propose in this thesis an interpretation of these different mechanisms of damage.
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 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Progress written by and published by . This book was released on 1982 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Crystals and Crystallinity in Polymers by : Claudio De Rosa
Download or read book Crystals and Crystallinity in Polymers written by Claudio De Rosa and published by John Wiley & Sons. This book was released on 2013-08-26 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the tools needed to master and apply the fundamentals of polymer crystallography Using core concepts in physics, chemistry, polymer science and engineering, this book sheds new light on the complex field of polymer crystallography, enabling readers to evaluate polymer crystallization data and determine the best methods to use for their investigations. The authors set forth a variety of tested and proven methods for analyzing ordered and disordered structures in polymer crystals, including X-ray diffraction, electron diffraction, and microscopy. In addition to the basics, the book explores several advanced and emerging topics in the field such as symmetry breaking, frustration, and the principle of density-driven phase formation. Crystals and Crystallinity in Polymers introduces two new concepts in crystallinity and crystals in synthetic polymers. First, crystallinity in polymeric materials is compatible with the absence of true three-dimensional long-range order. Second, the disorder may be described as a structural feature, using the methods of X-ray scattering and electron diffraction analysis. The book begins by introducing the basic principles and methods for building structural models for the conformation of polymer crystal chains. Next, it covers: Packing of macromolecules in polymer crystals Methods for extracting structural parameters from diffraction data Defects and disorder in polymer crystals Analytical methods for diffuse scattering from disordered polymer structures Crystal habit Influence of crystal defects and structural disorder on the physical and mechanical properties of polymeric materials Crystals and Crystallinity in Polymers examines all the possible types of structural disorder generally present in polymer crystals and describes the influence of each kind of disorder on X-ray and electron diffraction patterns. Its comprehensive, expert coverage makes it possible for readers to learn and apply the fundamentals of polymer crystallography to solve a broad range of problems.
Book Synopsis Plastic Deformation of Amorphous and Semi-crystalline Materials by : Bertrand Escaig
Download or read book Plastic Deformation of Amorphous and Semi-crystalline Materials written by Bertrand Escaig and published by . This book was released on 1982 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Defect Mediated Plasticity and Mechanical Properties of Energetic and Inert Molecular Single Crystals by : Kyle James Michael Ramos
Download or read book Defect Mediated Plasticity and Mechanical Properties of Energetic and Inert Molecular Single Crystals written by Kyle James Michael Ramos and published by . This book was released on 2009 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics of Deformation and Fracture of Polymers by : A. S. Argon
Download or read book The Physics of Deformation and Fracture of Polymers written by A. S. Argon and published by Cambridge University Press. This book was released on 2013-03-07 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demonstrating through examples, this book presents a mechanism-based perspective on the broad range of deformation and fracture response of solid polymers. It draws on the results of probing experiments and considers the similar mechanical responses of amorphous metals and inorganic compounds to develop advanced methodology for generating more precise forms of modelling. This, in turn, provides a better fundamental understanding of deformation and fracture phenomena in solid polymers. Such mechanism-based constitutive response forms have far-reaching application potential in the prediction of structural responses and in tailoring special microstructures for tough behaviour. Moreover, they can guide the development of computational codes for deformation processing of polymers at any level. Applications are wide-ranging, from large strain industrial deformation texturing to production of precision micro-fluidic devices, making this book of interest to both advanced graduate students and to practising professionals.
Book Synopsis Mechanisms of Plastic Deformation of Crystalline Polymer Solids by : Anton Peterlin
Download or read book Mechanisms of Plastic Deformation of Crystalline Polymer Solids written by Anton Peterlin and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Structure and Properties of Poly(lactic acid) by : Maria Laura Di Lorenzo
Download or read book Synthesis, Structure and Properties of Poly(lactic acid) written by Maria Laura Di Lorenzo and published by Springer. This book was released on 2017-10-20 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Advances in Polymer Science presents critical reviews of the present and future trends in polymer and biopolymer science. It covers all areas of research in polymer and biopolymer science including chemistry, physical chemistry, physics, material science.The thematic volumes are addressed to scientists, whether at universities or in industry, who wish to keep abreast of the important advances in the covered topics.Advances in Polymer Science enjoys a longstanding tradition and good reputation in its community. Each volume is dedicated to a current topic, and each review critically surveys one aspect of that topic, to place it within the context of the volume. The volumes typically summarize the significant developments of the last 5 to 10 years and discuss them critically, presenting selected examples, explaining and illustrating the important principles, and bringing together many important references of primary literature. On that basis, future research directions in the area can be discussed. Advances in Polymer Science volumes thus are important references for every polymer scientist, as well as for other scientists interested in polymer science - as an introduction to a neighboring field, or as a compilation of detailed information for the specialist.Review articles for the individual volumes are invited by the volume editors. Single contributions can be specially commissioned.Readership: Polymer scientists, or scientists in related fields interested in polymer and biopolymer science, at universities or in industry, graduate students
Book Synopsis Introduction to Materials Science and Engineering by : Yip-Wah Chung
Download or read book Introduction to Materials Science and Engineering written by Yip-Wah Chung and published by CRC Press. This book was released on 2006-12-13 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our civilization owes its most significant milestones to our use of materials. Metals gave us better agriculture and eventually the industrial revolution, silicon gave us the digital revolution, and we're just beginning to see what carbon nanotubes will give us. Taking a fresh, interdisciplinary look at the field, Introduction to Materials Scien
Book Synopsis Fundamentals of Materials Science and Engineering by : William D. Callister, Jr.
Download or read book Fundamentals of Materials Science and Engineering written by William D. Callister, Jr. and published by John Wiley & Sons. This book was released on 2012 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This text treats the important properties of the three primary types of materials--metals, ceramics, and polymers--as well as composites, and the relationships that exist between the structural elements of these materials and their properties. Emphasis is placed on mechanical behavior and failure including, techniques that are employed to improve the mechanical and failure characteristics in terms of alteration of structural elements. Furthermore, individual chapters discuss each of corrosion, electrical, thermal, magnetic, and optical properties. New and cutting-edge materials are also discussed. Even if an instructor does not have a strong materials background (i.e., is from mechanical, civil, chemical, or electrical engineering, or chemistry departments), he or she can easily teach from this text. The material is not at a level beyond which the students can comprehend--an instructor would not have to supplement in order to bring the students up to the level of the text. Also, the author has attempted to write in a concise, clear, and organized manner, using terminology that is familiar to the students. Extensive student and instructor resource supplements are also provided."--Publisher's description.
