The Role of Interface and Reinforcement in the Finite Deformation Response of Polyurethane-Montmorillonite Nanocomposites

  • Amit K. Kaushik
  • Ming Yang
  • Paul Podsiadlo
  • Anthony M. Waas
  • Nicholas A. Kotov
  • Ellen M. Arruda
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Nanoscale control over the structures is critical in designing nanocomposites with advanced properties. Structural parameters such as interface and volume fraction of reinforcement have tremendous effects on the mechanical properties of the nanocomposites, yet have proven difficult to control uniformly and consistently. Here we investigate the effect of reinforcement and interface on the finite deformation response of polyurethane (PU-) montmorillonite (MTM) nanocomposites at low and high strain rates. The multilayered PU-MTM nanocomposites, with alternate layers of PU and MTM, were manufactured using an exponential layer-by-layer (e-LBL) manufacturing technique. The systematic variation in MTM nanoparticle was obtained by either replacing several layers of MTM by polyacrylic acid (PAA) or by varying the thickness of PU layer. The interface was altered by replacing MTM layers by PAA. The deposition of PAA resulted in the formation of a complex polymer layer due to its diffusion through PU layer. The nanocomposites demonstrated an increasing yield strength and stiffness with increased strain rate and MTM volume fraction. The weaker interface interaction between the polymer and MTM nanoparticles resulted in a decreased yield strength and stiffness. The design parameters that will result in structures with optimum mechanical properties will be demonstrated.

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References

  1. 1.
    Kaushik Amit, Podsiadlo Paul, Yang Ming, Waas Anthony, Kotov Nicholas, Arruda Ellen. Designparameters in controlling the finite deformation response of polymer nanocomposites. In preparation.Google Scholar
  2. 2.
    Podsiadlo Paul, Michel Marc, Lee Jungwoo, Verploegen Eric, Kam Nadine, Ball Vincent, Lee Jaebeom,Qi Ying, Hart John, Hammond Paula Kotov Nicholas. Exponential growth of LBL films with incorporatedinorganic sheets. Nano Letters, 8(6): 1762–1770, 2008.CrossRefGoogle Scholar
  3. 3.
    Kaushik Amit, Podsiadlo Paul, Qin Ming, Shaw Charles, Waas Anthony, Kotov Nicholas, Arruda Ellen.The role of nanoparticle layer separation in the finite deformation response of layered polyurethane-claynanocomposites. Macromolecules, 42: 6588–6595, 2009.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Amit K. Kaushik
    • 1
  • Ming Yang
    • 2
  • Paul Podsiadlo
    • 3
  • Anthony M. Waas
    • 4
  • Nicholas A. Kotov
    • 2
  • Ellen M. Arruda
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of MichiganAnn ArborUSA
  2. 2.Department of Chemical EngineeringUniversity of MichiganAnn ArborUSA
  3. 3.Department of Aerospace EngineeringUniversity of MichiganAnn ArborUSA
  4. 4.Argonne Nation LaboratoryCenter for Nanoscale MaterialsArgonneUSA

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