Next Article in Journal
Acoustic Emission Signal Associated to Fiber Break during a Single Fiber Fragmentation Test: Modeling and Experiment
Previous Article in Journal
Comparison of Fracture Resistance of the Normal and High Strength Concrete Evaluated by Brazilian Disc Test
Article Menu
Issue 8 (ICEM 2018) cover image

Article Versions

Export Article

Open AccessProceedings
Proceedings 2018, 2(8), 398; https://doi.org/10.3390/ICEM18-05228

Ultrahigh Carbon Nanotube Volume Fraction Effects on Micromechanical Quasi-Static & Dynamic Properties of Poly(Urethane-Urea) Filled Nanocomposites

1
U.S. Army Research Laboratory, RDRL-VTM, Aberdeen Proving Ground, MD 21005-5069, USA
2
Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
3
Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge,MA 02139, USA
4
U.S. Army Research Laboratory, RDRL-WMM, Aberdeen Proving Ground, MD 21005-5069, USA
Presented at the 18th Interaction Conference on Experimental Mechanics, Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 15 May 2018
PDF [508 KB, uploaded 7 June 2018]

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 carbon nanotubes; polymer nanocomposites; polyurethane urea; self-assembly
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Gair, Jr., J.L.; Lidston, D.L.; Cole, D.P.; Lambeth, R.H.; Hsieh, A.J.; Bruck, H.A.; Hall, A.J.; Bundy, M.L.; Wardle, B.L. Ultrahigh Carbon Nanotube Volume Fraction Effects on Micromechanical Quasi-Static & Dynamic Properties of Poly(Urethane-Urea) Filled Nanocomposites. Proceedings 2018, 2, 398.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Proceedings EISSN 2504-3900 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top