Viscoelastic Response of Polymeric Fluids and Fiber Suspensions

VISCOELASTIC RESPONSE OF POLYMERIC FLUIDS AND FIBER SUSPENSIONS 

In Chapter 2 the pseudoplastic behavior of polymeric fluids was emphasized. In this chapter the viscoelastic behavior of polymer melts is discussed. It is this property that not only allows one to process these materials by a number of different ways such as blow molding and film blowing but also 

In Section 3.1 we define two basic flows used in the characterization of polymeric fluids along with the appropriate material functions. These basic flows are also found in polymer processes. In Section 3.2 several constitutive equations capable of describing the viscoelastic behavior of polymer melts are presented. The emphasis in this section is on manipulating these equations for flows in which the deformation history is known. In this section we have added discussion of fiber suspensions as they are commonly processed to yield materials with increased stiffness and strength. In Section 3.3 an introduction into the methods for measuring rheological properties is presented. In Section 3.4 several useful relationships between material functions are presented. These relationships (or correlations) are important as they allow one to obtain estimates, for example, of steady shear material functions from linear viscoelastic data. Because 

Polymer Processing Principles and Design, Second Edition. Donald G. Baiid and Dimitris I. ColUas. 2014 John Wiley Sons, Inc. Published 2014 by John Wiley Sons, Inc. 

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