Viscoelastic Properties Of Polymers

Viscoelastic Properties of Polymers PDF
Author: John D. Ferry
Publisher: John Wiley & Sons
ISBN: 9780471048947
Size: 26.26 MB
Format: PDF, Mobi
Category : Technology & Engineering
Languages : en
Pages : 672
View: 2101

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Viscoelastic behavior reflects the combined viscous and elastic responses, under mechanical stress, of materials which are intermediate between liquids and solids in character. Polymers the basic materials of the rubber and plastic industries and important to the textile, petroleum, automobile, paper, and pharmaceutical industries as well exhibit viscoelasticity to a pronounced degree. Their viscoelastic properties determine the mechanical performance of the final products of these industries, and also the success of processing methods at intermediate stages of production. Viscoelastic Properties of Polymers examines, in detail, the effects of the many variables on which the basic viscoelastic properties depend. These include temperature, pressure, and time; polymer chemical composition, molecular weight and weight distribution, branching and crystallinity; dilution with solvents or plasticizers; and mixture with other materials to form composite systems. With guidance by molecular theory, the dependence of viscoelastic properties on these variables can be simplified by introducing certain ancillary concepts such as the fractional free volume, the monomeric friction coefficient, and the spacing between entanglement loci, to provide a qualitative understanding and in many cases a quantitative prediction of how to achieve desired results. The phenomenological theory of viscoelasticity which permits interrelation of the results of different types of experiments is presented first, with many useful approximation procedures for calculations given. A wide variety of experimental methods is then described, with critical evaluation of their applicability to polymeric materials of different consistencies and in different regions of the time scale (or, for oscillating deformations, the frequency scale). A review of the present state of molecular theory follows, so that viscoelasticity can be related to the motions of flexible polymer molecules and their entanglements and network junctions. The dependence of viscoestic properties on temperature and pressure, and its descriptions using reduced variables, are discussed in detail. Several chapters are then devoted to the dependence of viscoelastic properties on chemical composition, molecular weight, presence of diluents, and other features, for several characteristic classes of polymer materials. Finally, a few examples are given to illustrate the many potential applications of these principles to practical problems in the processing and use of rubbers, plastics, and fibers, and in the control of vibration and noise. The third edition has been brought up to date to reflect the important developments, in a decade of exceptionally active research, which have led to a wider use of polymers, and a wider recognition of the importance and range of application of viscoelastic properties. Additional data have been incorporated, and the book s chapters on dilute solutions, theory of undiluted polymers, plateau and terminal zones, cross-linked polymers, and concentrated solutions have been extensively rewritten to take into account new theories and new experimental results. Technical managers and research workers in the wide range of industries in which polymers play an important role will find that the book provides basic information for practical applications, and graduate students in chemistry and engineering will find, in its illustrations with real data and real numbers, an accessible introduction to the principles of viscoelasticity.

Mechanical Properties Of Solid Polymers

Mechanical Properties of Solid Polymers PDF
Author: Ian M. Ward
Publisher: John Wiley & Sons
ISBN: 1119967112
Size: 24.72 MB
Format: PDF, ePub
Category : Technology & Engineering
Languages : en
Pages : 480
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Providing an updated and comprehensive account of the propertiesof solid polymers, the book covers all aspects of mechanicalbehaviour. This includes finite elastic behavior, linearviscoelasticity and mechanical relaxations, mechanical anisotropy,non-linear viscoelasicity, yield behavior and fracture. New to thisedition is coverage of polymer nanocomposites, and molecularinterpretations of yield, e.g. Bowden, Young, and Argon. The book begins by focusing on the structure of polymers,including their chemical composition and physical structure. It goes on to discuss the mechanical properties and behaviour ofpolymers, the statistical molecular theories of the rubber-likestate and describes aspects of linear viscoelastic behaviour, itsmeasurement, and experimental studies. Later chapters cover composites and experimental behaviour,relaxation transitions, stress and yielding. The book concludeswith a discussion of breaking phenomena.

Properties And Behavior Of Polymers 2 Volume Set

Properties and Behavior of Polymers  2 Volume Set PDF
Author: Wiley
Publisher: John Wiley & Sons
ISBN: 1118582837
Size: 25.85 MB
Format: PDF
Category : Technology & Engineering
Languages : en
Pages : 1616
View: 2596

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The book provides comprehensive, up-to-date information on the physical properties of polymers including, viscoelasticity, flammability, miscibility, optical properties, surface properties and more. Containing carefully selected reprints from the Wiley's renowned Encyclopedia of Polymer Science and Technology, this reference features the same breadth and quality of coverage and clarity of presentation found in the original.

Polymer Viscoelasticity

Polymer Viscoelasticity PDF
Author: Evaristo Riande
Publisher: CRC Press
ISBN: 9780824779047
Size: 64.26 MB
Format: PDF, ePub
Category : Technology & Engineering
Languages : en
Pages : 904
View: 1932

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Showcasing vital engineering applications to transient and dynamic pertubations of macromolecular materials, structural recovery's role in mechanical responses in the glassy state, and viscoelastic parameters that condition the non-Newtonian behaviour of polymers, this work presents a systematic account of the responses of macromolecular materials to mechanical force fields. It focuses on the most important features of the linear stress-strain relationships for ideal solids and liquids.