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Synopsis The book covers wide range of topics in the polymer rheology. These include: The basic principles, parameters, systems and applied mathematical models used in the rheological studies. The melt flow analysis of different non-Newtonian fluids in laminar flow, transition between Iamina and turbulent flow and modified Reynolds etc. the effects of different physical and molecular parameters on purely viscous rheologi response of polymer melts and solutions. Principles of rheometery and different types viscometers and on-line rheometers. The static and dynamic viscoelastic response of the polymenr melts and solutions, linear viscoelasticity, mechanical models and Boltzmann superposition principle. Molecular structure-viscoelasticity relationship and linear and nonlinear viscoelasticity. The effects of various process, material and molecular parameters on the dynamic viscoelastic functions. The role of rheology in polymer processing in different equipment. A good number of solved examples and exercise problems. The modified power law constants and two range power law constants for a large number of polymer melts, rheology software programme in Java, comparison of different rheologial models using the rheology software and answers to the problems. The book will be of immense help to both undergraduate and postgraduate students, teachers, polymer engineers an practicing rheologists.