Molecular influence in high-strain-rate microparticle impact response of poly(urethane urea) elastomers
Name
LIPIT PUU Veysset Polymer.pdf
Description
Main article
Size
3.21 MB
Format
Adobe PDF
Checksum (MD5)
2737a4b22bbb6a703bdcca7d973b7f3d
Author(s)
Veysset, David Georges
Hsieh, Alex J
Kooi, Steven E
Nelson, Keith Adam
Date Issued
June 2017
Journal
Polymer
Publisher
Elsevier BV
Citation
Veysset, David et al. "Molecular influence in high-strain-rate microparticle impact response of poly(urethane urea) elastomers." Polymer 123 (August 2017): 30-38
Version
Author's final manuscript
Abstract
The dynamic deformation response of select model poly(urethane urea) elastomers (PUU) at high strain rates is investigated via an all-optical laser-induced projectile impact test (LIPIT). LIPIT measurements allow the direct visualization of the impact of micro-projectiles (silica spheres) on substrates and in-situ characterization, including depth of penetration and the extent of rebound of the micro-projectiles. PUUs are proven to be robust and the silica spheres are observed to rebound from them upon impact. In addition, for PUUs a strong correlation was noted between the coefficient of restitution and the maximum depth of penetration. Also, the coefficient of restitution data is comparable to that of glassy polycarbonate (PC), which is in great contrast to the comparison of the corresponding ambient storage modulus data obtained via dynamic mechanical analysis at 1 Hz. We hypothesize that high-rate deformation-induced glass transition is a plausible molecular relaxation mechanism towards macroscopic, dynamic stiffening/strengthening in PUUs. Keywords: Laser-induced particle impact test (LIPIT); Micro-ballistics; Poly(urethane urea) elastomers; Coefficient of restitution; Depth of penetration; Segmental dynamics; High-rate deformation-induced glass transition
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.polymer.2017.06.071
