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A Simple Model for the Deformation-Induced Relaxation of Glassy Polymers by Fielding, S. M.; Larson, R. G.; Cates, M. E. is a scholarly article available to read on EtoBox.

What is A Simple Model for the Deformation-Induced Relaxation of Glassy Polymers about?

Glassy polymers show strain hardening: at constant extensional load, their flow first accelerates, then arrests. Recent experiments have found this to be accompanied by a striking and unexplained dip in the segmental relaxation time. Here we explain such behavior by combining a minimal model of flow-induced liquefaction of a glass, with a description of the stress carried by strained polymers, creating a non-factorable interplay between aging and strain-induced rejuvenation. Under constant load, liquefaction of segmental motion permits strong flow that creates polymer-borne stress. This slows the deformation enough for the segmental modes to re-vitrify, causing strain hardening.

Author

Fielding, S. M.; Larson, R. G.; Cates, M. E.

Published

2011

Language

EN