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

Proceedings

Hsieh, Alex J.¹  Cole, Daniel P.²  Lidston, Dale L.³  Bruck, Hugh A.⁴  Gair, Jr., Jeffrey L.⁵  Lambeth, Robert H.⁶ 

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

关键词: carbon nanotubes;    polymer nanocomposites;    polyurethane urea;    self-assembly;   

DOI  :  10.3390/ICEM18-05228

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY