Viscoelastic behavior of liquidcrystal polymer in composite. John douglass ferry may 4, 1912october 18, 2002 by robert f. Viscoelastic properties and structure of polymer blends and. Estimating material viscoelastic properties based on.
Stafford, soft matter communications, 5, 4638 4641 2009. In a viscoelastic materialpoissons ratio is a function of time or frequency that depends on thetime regime chosen to elicit it. Ferry was a towering figure in polymer sciencein the. Ferry, viscoelastic behavior of polymers chapter 2.
Ferry author of advances in polymer science, volume 33. Additional synthetic polymers will help to stabilize and keep the material behaving like it was supposed. Strobl the physics of polymers 2 nd edition, springer, 1997. 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. The simplest approach to the dynamics of polymers is the rouse, bead and spring model which. Due to their structural complexity and timedependent properties, viscoelastic materials, such as elastomers or rubbers, are extensively used in engineering applications involving automotive belts and tires, seals, or biomedical devices. Pdf comment on viscoelastic properties of confined. Investigation of the viscoelastic properties of binary. Viscoelasticity in terms of polymers at low temperature, it is elastic at high temperature, it is liquid or viscous. Viscoelastic properties of polymer solutions by john d. A simplified model of the molecule is assumed and its general motion is treated by the method of normal coordinates.
Viscoelastic properties of polymers examines, in detail, the. Estimating material viscoelastic properties based on surface wave measurements. Viscoelastic properties of polymers edition 3 by john d. Institute for the study of metals, the university of chicago. Polymersthe basic materials of the rubber and plastic industries and important to the textile, petroleum, automobile, paper, and pharmaceutical industries as wellexhibit viscoelasticity to a pronounced degree. Viscoelastic properties of polymers examines, in detail, the effects of the many variables on which the basic viscoelastic properties depend. The equation represents the kelvin or voigt model for linear viscoelastic. Viscoelastic materials also help to deal with the concept of creep. Department of mechanical and industrial engineering, university of illinois at chicago. Christensen, theory of viscoelasticity, 2nd edition.
Radiation chemistry of monomers, polymers, and plastics. Viscoelastic properties of polymer solutions ferry, john d. Publication date 1948 publisher national bureau of standards collection. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation. Viscoelastic properties of polymers examines, in detail, the effects of the many variables on which the basic viscoelastic properties. A comparison of techniques and modeling assumptions. Enter your mobile number or email address below and well send you a link to download the free kindle app. Ferry2 in a concentrated polymer solution, the entanglement of longchain molecules results in a transient network structure, to which may be attributed certain aspects of the viscoelastic behavior of such a system. The viscoelastic properties approximation argument. Viscoelastic properties of polymer solutions by ferry, john d. The basic concepts of viscoelasticity, dealing with the fact that polymers above glasstransition temperature exhibit high entropic elasticity, are described at beginner level. If this is the first time you use this feature, you will be asked to authorise cambridge core to connect. Viscoelastic definition of viscoelastic by the free dictionary. Extracting the elastic and viscoelastic properties of a polymeric film using a sharp indentation.
Thermorheological complexity of the softening dispersion in polyisobutylene d. Ferry is the author of advances in polymer science, volume 33 0. Ferry, viscoelastic properties of polymers, john wiley 1960 p. Download the bookshelf mobile app at or from the itunes or android store to access your ebooks from your mobile device or ereader. In this chapter, a discussion of the viscoelastic properties of selected polymeric materials is performed. Viscoelastic properties and structure of polymer blends. Viscoelastic properties of polymers by ferry, john d. Extracting the mechanical properties of a viscoelastic polymeric film on a hard elastic substrate volume 19 issue 10 c. Polymers from living organisms produce a more elastic dough. We can consider ideal behaviors for materials in terms of simple, linear constitutive equations. There is an enormous literature devoted to constitutive models for the linear viscoelastic response of polymer solutions and entangled melts 14. 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. Storage modulus e, loss modulus e and damping factor tan. Extracting the mechanical properties of a viscoelastic.
Combined mechanical characteristics are termed as viscoelasticity. Viscoelastic relaxation modulus viscoelastic behavior depends upon time temperaturerelaxation modulus 24. As the market leader for these products for over 40 years, we have helped our clients develop hundreds of uses for viscoelastic polymers materials. Viscoelastic seal and viscoelastic seals viscoelastic material the akton viscoelastic polymer is currently sold in over 50 countries worldwide and has earned a sterling reputation as a highperformance, highquality product that is the legacy of its founder, dr. Elastic materials strain when stretched and immediately return to their original state once the stress is removed. Modes of relaxation the concepts presented in chapter 1 are empirical descriptions of phenomena, that is the concept of a primary response function, a time dependent modulus and a time dependent.
In some applications, even a small viscoelastic response can be. Polymers in dilute solution in contrast to dilute particles in contrast to a polymer melt the focus of rouses paper is on linear polymers, dilutely suspended in a newtonian. Ferry, 9780471048947, available at book depository with free delivery worldwide. General equations have been developed such that when the manner of application of external forces to the molecule is known, the molecules general behavior may be found in a convenient and. A theory of the linear viscoelastic properties of dilute. Comment on viscoelastic properties of con ned polymer lms measured via thermal wrinkling by edwin p. Comment on viscoelastic properties of con ned polymer lms. Viscoelastic behavior reflects the combined viscous and elastic responses, under mechanical stress. Dec 29, 2004 a general method has been devised to predict the viscoelastic behavior of plastics.
Ferry was a towering figure in polymer sciencein the development of our understanding of. Viscoelastic materials have elements of both of these properties and, as such, exhibit timedependent strain. Ferry was a towering figure in polymer sciencein the development of our understanding of viscoelasticity and its origins in polymer structure and associated local and longrange molecular motions. Viscoelastic properties of polymers examines, in detail, the effects of the many. A constitutive equation is and equation that relates the response of a material to the strength of a.
Viscoelastic definition of viscoelastic by the free. Also, the similar problem for linear material has been solved together with the creep and stress relaxation problems. Characterization of mechanical properties of polymers by nanoindentation tests. Whereas elasticity is usually the result of bond stretching along crystallographic planes in an ordered solid, viscosity is the result of the diffusion of atoms or molecules inside an amorphous material. Modes of relaxation the concepts presented in chapter 1 are empirical descriptions of phenomena, that is the concept of a primary response function, a time dependent modulus and a time dependent susceptibility do.
Showcasing vital engineering applications to transient and dynamic pertubations of macromolecular materials, structural recoverys role in mechanical responses in the glassy state, and viscoelastic parameters that condition the nonnewtonian behaviour of polymers, this work presents a systematic account of the responses of macromolecular materials to mechanical force fields. Introduction classical theory of elasticity mechanical properties of elastic solids hokean body body that hook law is walid for hooks law ut tensio, sic vis robert hook, 1678 translate. Viscoelastic properties of polymers, 3rd edition wiley. Viscoelastic behavior reflects the combined viscous and elastic responses, under mechanical stress, of materials which are intermediate between liquids and solids in character. Viscoelastic materials book, viscoelasticity book, text book for course on viscoelasticity, engineering courses in civil, mechanical, biomedical engineering, viscoelasticity course. Chay department of materials science and engineering, university of pittsburgh, pittsburgh, pennsylvania 15261 k. Viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation. The properties of interest are of a viscoelastic nature, with always involves some kind of time constant associated with a relaxation. This deformity may be permanent and may also represent a potential or imminent failure, depending on the material that is represented. The main attention is given to experiments involving shear deformation of polymer solutions, since it provides the most significant data concerning the optimal processing of final. Synthetic polymers, wood, and human tissue, as well as metals at high temperature, display significant viscoelastic effects. Review the full course description and key learning outcomes and create an account and.
A suitable mechanical model for representing this network as a. Dynamic mechanical relaxation has been used to investigate the viscoelastic properties of polymer blends at the surface of an inorganic filler over a. Then you can start reading kindle books on your smartphone, tablet, or. Stress and strain in practice crc press book showcasing vital engineering applications to transient and dynamic pertubations of macromolecular materials, structural recoverys role in mechanical responses in the glassy state, and viscoelastic parameters that condition the nonnewtonian behaviour of polymers, this work. Viscous materials, like water, resist shear flow and strain linearly with time when a stress is applied. It is important as one of the materialfunctions that characterize.
1485 298 1556 371 587 985 895 475 1260 644 276 927 1313 1181 825 47 683 1158 1370 824 277 1381 303 1320 665 319 665 1024 635 1203 728 57 143 950 963 1345 84 331 637 801 231 1297 1399 469 82 914