Microscopic View of Accelerated Dynamics in Deformed Polymer Glasses

TitleMicroscopic View of Accelerated Dynamics in Deformed Polymer Glasses
Publication TypeJournal Article
Year of Publication2010
AuthorsWarren, Mya, and Jörg Rottler
JournalPhysical Review Letters
AbstractA molecular level analysis of segmental trajectories obtained from molecular dynamics simulations is used to obtain the full relaxation time spectrum in aging polymer glasses subject to three different deformation protocols. As in experiments, dynamics can be accelerated by several orders of magnitude, and a narrowing of the distribution of relaxation times during creep is directly observed. Additionally, the acceleration factor describing the transformation of the relaxation time distributions is computed and found to obey a universal dependence on the strain, independent of age and deformation protocol.
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