Macromolecular Rapid Communications, volume 42, issue 1, pages 2000449

Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers.

Shannahan Logan S. 1
Lin Yangju 2
Berry James F 1
Barbee Meredith H 2
FERMEN-COKER MÜGE 1
Craig Stephen L. 2
1
 
US Army Research Laboratory Maryland City MD 21005 USA
2
 
Department of Chemistry Duke University 124 Science Drive Durham NC 27708‐0346 USA
Publication typeJournal Article
Publication date2020-10-21
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.6
ISSN10221336, 15213927
Materials Chemistry
Organic Chemistry
Polymers and Plastics
Abstract
The molecular processes that accompany dynamic mechanical response to large deformations at high strain rate (≈1000 s-1 or higher) underlie the early stages of damage in materials, but understanding of material response in this regime is typically limited to macroscopic constitutive equations. Here, spiropyran mechanophores are embedded in very short, stress-bearing strands in silicone elastomers, and their mechanochromic response to uniaxial compression is explored in a Split Hopkinson Pressure (or Kolsky) Bar. At strain rates of 1000 s-1 , the onset of mechanochromism occurs at lower strains, but higher stresses, than in the same materials under quasi-static loading. Similar to quasi-static loading, however, a negligible effect of mechanophore structure on the critical strain for colorimetric onset is observed. The results suggest that nonequilibrium, inhomogeneous local tension distributions in the elastomers lead to greater stress in individual strands than at the same strains under equilibrium loading, but that within the regions of force concentration, mechanochromic onset is determined primarily by a limiting local strain threshold.

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Shannahan L. S. et al. Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers. // Macromolecular Rapid Communications. 2020. Vol. 42. No. 1. p. 2000449.
GOST all authors (up to 50) Copy
Shannahan L. S., Lin Y., Berry J. F., Barbee M. H., FERMEN-COKER M., Craig S. L. Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers. // Macromolecular Rapid Communications. 2020. Vol. 42. No. 1. p. 2000449.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1002/marc.202000449
UR - https://doi.org/10.1002%2Fmarc.202000449
TI - Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers.
T2 - Macromolecular Rapid Communications
AU - Shannahan, Logan S.
AU - Berry, James F
AU - FERMEN-COKER, MÜGE
AU - Lin, Yangju
AU - Barbee, Meredith H
AU - Craig, Stephen L.
PY - 2020
DA - 2020/10/21 00:00:00
PB - Wiley
SP - 2000449
IS - 1
VL - 42
SN - 1022-1336
SN - 1521-3927
ER -
BibTex |
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BibTex Copy
@article{2020_Shannahan
author = {Logan S. Shannahan and James F Berry and MÜGE FERMEN-COKER and Yangju Lin and Meredith H Barbee and Stephen L. Craig},
title = {Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers.},
journal = {Macromolecular Rapid Communications},
year = {2020},
volume = {42},
publisher = {Wiley},
month = {oct},
url = {https://doi.org/10.1002%2Fmarc.202000449},
number = {1},
pages = {2000449},
doi = {10.1002/marc.202000449}
}
MLA
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Shannahan, Logan S., et al. “Onset of Mechanochromic Response in the High Strain Rate Uniaxial Compression of Spiropyran Embedded Silicone Elastomers..” Macromolecular Rapid Communications, vol. 42, no. 1, Oct. 2020, p. 2000449. https://doi.org/10.1002%2Fmarc.202000449.
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