Now in its 4th edition, Introduction to Polymer Viscoelasticity remains a classic in the literature of molecular viscoelasticity, bridging the gap between primers on polymer science and advanced research-level monographs. Assuming a molecular, rather than a mechanical approach, the text provides a strong grounding in the fundamental concepts, detailed derivations, and particular attention to assumptions, simplifications, and limitations. Revisions to the new edition feature the addition of new measurement techniques, cpverage of biopolymer viscoelasticity, and discussion of the relationship between mechanical polymer properties and viscoelastic functions. In addition, there are two new ections to address modern areas of viscoelastic measurement: large amplitude oscillatory shear (LAOS) and microrheology. In-text problems are added and an Instructors Manual (including solutions) is available for adopting professors.