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Simple Model for the Deformation-Induced Relaxation of Glassy Polymers

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

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Authors

R.G. Larson

M.E. Cates



Abstract

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 nonfactorable 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 revitrify, causing strain hardening.

Citation

Fielding, S., Larson, R., & Cates, M. (2012). Simple Model for the Deformation-Induced Relaxation of Glassy Polymers. Physical Review Letters, 108(4), Article 048301. https://doi.org/10.1103/physrevlett.108.048301

Journal Article Type Article
Publication Date Jan 1, 2012
Deposit Date Jan 31, 2012
Publicly Available Date Nov 28, 2012
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 108
Issue 4
Article Number 048301
DOI https://doi.org/10.1103/physrevlett.108.048301
Public URL https://durham-repository.worktribe.com/output/1510078

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Copyright Statement
© 2012 American Physical Society






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