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Deformation-induced mobility in polymer glasses during multistep creep experiments and simulations

Macromolecules, ISSN: 0024-9297, Vol: 42, Issue: 12, Page: 4328-4336
2009
  • 112
    Citations
  • 0
    Usage
  • 76
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    112
    • Citation Indexes
      112
  • Captures
    76
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Load-bearing entanglements in polymer glasses

The role of entanglements can determine the mechanical properties of glass polymer blends. In a new report now published on Science Advances, Cynthia Bukowski and a research team in polymer science and biomolecular engineering at the University of Massachusetts and the University of Pennsylvania, U.S., developed a combined method of experiments and simulations to quantify the role of entanglements

Article Description

Optical photobleaching experiments and molecular dynamics computer simulations were used to investigate changes in segmental mobility during tensile creep deformation of polymer glasses. Experiments were performed on lightly cross-linked PMMA, and the simulations utilized a coarse-grained model. For both single-step and multistep creep deformations, the experiments and simulations show remarkably similar trends, with changes of mobility during deformation exceeding a factor of 100. Both experiment and simulation show a strong correlation between strain rate and mobility in single-step creep. However, in multistep creep, the correlation between strain rate and mobility is broken in both experiment and simulation; this emphasizes that no simple mechanical variable is likely to exhibit a simple relationship with molecular mobility universally. Both simulations and experiments show many features that are inconsistent with the Eyring model. © 2009 American Chemical Society.

Bibliographic Details

Hau Nan Lee; M. D. Ediger; Robert A. Riggleman; Juan J. De Pablo

American Chemical Society (ACS)

Chemistry; Materials Science

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