Cited by 45High-Velocity Impact and Material BehaviorPolymer composites and self-healingPolymer crystallization and properties

Molecular dependencies of dynamic stiffening and strengthening through high strain rate microparticle impact of polyurethane and polyurea elastomers

Open access
Sun, Yuchen, Wu, You-Chi Mason, Veysset, David, Kooi, Steven E., Hu, Weiguo, Swager, Timothy M., Nelson, Keith A., Hsieh, Alex J.·2019·Applied Physics Letters

Abstract

This study investigates the molecular dependencies of dynamic stiffening and strengthening through comparison of high strain rate impact responses of various polyurethanes and polyureas. We use an in-house designed tabletop microimpact experimental platform—the laser-induced particle impact test—to perform high strain rate impacts and measure the corresponding material response. Dynamic mechanical analysis and differential scanning calorimetry are used to show that glass transition temperature is a useful predictor of the impact response at ambient temperatures. Meanwhile, solid-state nuclear magnetic resonance spectroscopy identifies segmental dynamics as an important determinant of the variation in both dynamic stiffening and strengthening. The impact responses of polyurethanes and polyureas both show clear dependencies on the molecular weight of the soft segment. This comparison suggests the state of intermolecular hydrogen bonding plays a key role in dynamic stiffening and strengthening. This study aims to identify the molecular dependencies of the impact response and establish a foundation for further design and testing of optimal high strain rate characteristics in synthetic elastomers.

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  • LIPIT has been utilized previously to study the impact responses of gels, metals, ceramics, and a range of other materials.

    “LIPIT has been utilized previously to study the impact responses of gels, metals, ceramics, and a range of other materials 29,37-40 .”

    From Cleavable comonomers enable degradable, recyclable thermoset plastics (2020) · cites this paper as [40]

    The passage labeled Abstract says LIPIT has been used to test high-strain-rate impact responses in gels, segmented elastomers, and other materials. It does not identify metals or ceramics, so those specific examples are not supported by this source's text. (LLM, conf=0.86)

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Research works printed but not linked: 26

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Authors
Sun, Y., Wu, Y.-C. M., Veysset, D., Kooi, S. E., Hu, W., Swager, T. M., Nelson, K. A., & Hsieh, A. J.
Affiliations
  • Institute for Soldier Nanotechnologies (US)
  • University of Massachusetts Amherst (US)
  • United States Army Combat Capabilities Development Command (US)
Corresponding author
Sun, Yuchen
Venue
Applied Physics Letters
Published
2019-08-26
Volume
115
Issue
9
ISSN
  • 0003-6951 (ISSN-L)
  • 1077-3118
OpenAlex
W2970185143
Cited by
45
References
28
Citations by year
2026: 4 · 2025: 8 · 2024: 5 · 2023: 5 · 2022: 7 · 2021: 8 · 2020: 7 · 2019: 1
FWCI
2.08
Type
journal article
Language
en
Open access
Locations
  • Applied Physics Letters (publishedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc-sa)
  • Other repository
Funders
Army Research Office (W911NF-18-2-0048)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › High-Velocity Impact and Material Behavior
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
Keywords
dynamic stiffening, dynamic strengthening, high strain rate impact, polyurethane elastomers, polyurea elastomers, glass transition temperature, segmental motion, soft segment molecular weight, hydrogen bonding

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