Ultrahigh Carbon Nanotube Volume Fraction Effects on Micromechanical Quasi-Static & Dynamic Properties of Poly(Urethane-Urea) Filled Nanocomposites
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proceedings-02-00398-v2.pdf
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Author(s)
Gair, Jr., Jeffrey L.
Cole, Daniel P.
Lambeth, Robert H.
Hsieh, Alex J.
Bruck, Hugh A.
Hall, Asha J.
Bundy, Mark L.
Lidston, Dale Leigh
Wardle, Brian L
Date Issued
May 2018
Journal
Proceedings
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Citation
Gair, Jr. et al. "Ultrahigh Carbon Nanotube Volume Fraction Effects on Micromechanical Quasi-Static & Dynamic Properties of Poly(Urethane-Urea) Filled Nanocomposites." Proceedings 2, 8 (May 2018): 398 © 2018 The Authors
Version
Final published version
Abstract
Poly(urethane-urea) (PUU) has been infused into ultrahigh volume fraction carbon nanotube (CNT) forests using a heat-curable polymer formula. Polymer nanocomposites with carbon nanotube volume-fractions of 1%, 5%, 10%, 20%, and 30% were fabricated by overcoming densification and infusion obstacles. These polymer nanocomposites were nanoindented quasi-statically and dynamically to discern process-structure-(mechanical) property relations of polymerizing PUU in such densely-packed CNT forests. A 100× increase in indentation modulus has been observed, which is attributed not only to CNT reinforcement of the matrix, but also to molecular interactions in the matrix itself. Quasi-static elastic moduli ranging from 10 MPa–4.5 GPa have been recorded. Storage modulus for all materials is found to track well at loadings of 200 Hz, with little effect observed from increasing CNT volume fraction. Keywords: carbon nanotubes; polymer nanocomposites; polyurethane urea; self-assembly
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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DOI of Published Version
https://doi.org/10.3390/ICEM18-05228
