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Properties of Elastomer-based Particulate Composites

  • A. V. Amirkhizi
  • J. Qiao
  • K. Schaaf
  • S. Nemat-Nasser
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

In this work, an attempt has been made to develop fly ash filled polyurea matrix composites with low density and good dynamic mechanical behavior. Fly ash (105μm –149μm in diameter) was introduced into polyurea, and its volume fraction was varied to study its effects on the overall properties of the composites. Scanning electron microscopy was used to observe the morphology of the composites. The storage and loss moduli of the composites were determined using dynamic mechanical analysis (DMA) from -80 to 70°C at low frequencies and using ultrasonic measurements at high frequencies under ambient conditions. Results showed that fly ash particles were distributed homogeneously in the polyurea matrix, and the density of the composites decreased as the volume fraction of fly ash increased. Compared to neat polyurea, increases in storage and loss moduli at high temperature were achieved by increasing fly ash content. The peak in the ratio of the moduli of the composites system over that of neat polyurea occurred near glass transition temperature Tg. The speed of sound in the composites increased with increasing fly ash content. Longitudinal modulus and acoustic impedance had similar trends.

Keywords

polyurea elastomer fly ash composites dynamic mechanical properties acoustic properties 

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ReferenceS

  1. 1.
    Mock. W; Balizer, E., Penetration protection of steel plates with polyurea layer, Presented at Polyurea Properties and Enhancement of Structures under Dynamic Loads, 2005, Airlie, VA.Google Scholar
  2. 2.
    Amini, M.R.; Isaacs, J.B.; Nemat-Nasser, S., Effect of polyurea on the dynamic response of steel plates, Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, St Louis, MO. June 4-7, 2006.Google Scholar
  3. 3.
    Bahei-el-din, Y.A.; Dvorak, G.J., A blast-tolerant sandwich plate design with a polyurea interlayer, International Journal of Solids and Structures, 43(25-26), 7644-7658, 2006zbMATHCrossRefGoogle Scholar
  4. 4.
    Tekalur, S.A.; Shukla, A.; Shivakumar, K., Blast resistance of polyurea based layered composite materials, Composite Structures, 84, 271-281, 2008CrossRefGoogle Scholar
  5. 5.
    Oliver P., Ioualalen K., Cottu J.P., Dynamic Mechanical Spectrometry Analysis of Modifications in the Cure Kinetics of Polyepoxy Composites, Journal of Applied Polymer Science, 63(6), 745-760, 1998CrossRefGoogle Scholar
  6. 6.
    The Dow Chemical Company, Isonate 143L; Modified MDI (Dow Chemical, Midland, MI, 2001).Google Scholar
  7. 7.
    Air Products Chemicals, Inc., Polyurethane Specialty Products (Air Products and Chemicals, Allentown, PA, 2003).Google Scholar
  8. 8.
    Dou, Z.Y. Study of damping and impact energy absorption behaviors and mechanisms of cenosphere/Al porous meterials, PhD dissertation, Harbin Institute of Technology, 2008Google Scholar
  9. 9.
    Lee, B.L.; Nielsen, L.E., Temperature dependence of the dynamic mechanical properties of filled polymers, Journal of Polymer Science Part B: Polymer Physics, 15, 683-692, 1997Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • A. V. Amirkhizi
    • 1
  • J. Qiao
    • 1
    • 2
  • K. Schaaf
    • 1
  • S. Nemat-Nasser
    • 1
  1. 1.Department of Mechanical and Aerospace Engineering, Center of Excellence for Advanced MaterialsUniversity of California, San DiegoLa JollaUSA
  2. 2.School of Materials Science and EngineeringHarbin Institute of TechnologyHarbinChina

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