{"product_id":"viscoelastic-properties-of-polymers","title":"Viscoelastic Properties of Polymers","description":"\u003cp\u003eViscoelastic 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.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":44958106681397,"sku":"ByrdShop_0471048941","price":304.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8139\/0901\/files\/9780471048947.jpg?v=1770364517","url":"https:\/\/atxbooks.com\/products\/viscoelastic-properties-of-polymers","provider":"ATX Books","version":"1.0","type":"link"}