Why is understanding glassy polymer mechanics so difficult?

Robert S. Hoy

doi:10.1002/polb.22276

journal article May 23, 2011

Why is understanding glassy polymer mechanics so difficult?

Robert S. Hoy

Journal of Polymer Science Part B: Polymer Physics Vol. 49 No. 14 pp. 979-984 · Wiley

View at Publisher Save 10.1002/polb.22276

Abstract

AbstractIn this Perspective, I describe recent work on systems in which the traditional distinctions between (i) unentangled versus well‐entangled systems and (ii) melts versus glasses seem least useful, and argue for the broader use in glassy polymer mechanics of two more dichotomies: systems which possess (iii) unary versus binary and (iv) cooperative versus noncooperative relaxation dynamics. I discuss the applicability of (iii–iv) to understanding the functional form of strain hardening. Results from molecular dynamics simulations show that the “dramatic” hardening observed in densely entangled systems is associated with a crossover from unary, noncooperative to binary, cooperative relaxation as strain increases; chains stretch between entanglement points, altering the character of local plasticity. Promising approaches for future research along these lines are discussed. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011

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References

Details

Published: May 23, 2011
Vol/Issue: 49(14)
Pages: 979-984
License: View

Authors

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Robert S. Hoy

Cite This Article

Robert S. Hoy (2011). Why is understanding glassy polymer mechanics so difficult?. Journal of Polymer Science Part B: Polymer Physics, 49(14), 979-984. https://doi.org/10.1002/polb.22276

Why is understanding glassy polymer mechanics so difficult?

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