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    Bartyczak, Susan and Mock, Willis 2015. Elastomeric Polymers with High Rate Sensitivity.


    2015. Elastomeric Polymers with High Rate Sensitivity.


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Investigation of microstructural changes in impacted polyurea coatings using small angle X-ray scattering (SAXS)

  • Edward Balizer (a1), Jeffry Fedderly (a1), Gilbert Lee (a1), Susan Bartyczak (a2) and Willis Mock (a2)
  • DOI: http://dx.doi.org/10.1154/1.3590738
  • Published online: 01 March 2012
Abstract

Three polyureas with decreasing soft segment molecular weights of 1000, 650, and a 250/1000 blend were molded onto circular steel plates and then impacted with a high speed (275 m/s) conical-shaped steel cylinder. The polyurea layer of the post mortem bilayers was characterized on a molecular level by small angle synchrotron X-ray scattering (SAXS) at the Advanced Photon Source at the Argonne National Laboratory. Analysis revealed that the hard domains of the polyureas with lower molecular weight soft segments reformed and oriented over a greater area of the coating, thus increasing the polymer strain hardening and resulting in visibly less out of plane bilayer deformation. This agrees with the hypothesis that polymer strain hardening is a mechanism that retards necking failure of the metal plate.

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S. Das , I. Yilgor , E. Yilgor , B. Inci , O. Tezgel , F. L. Beyer , and G. L. Wilkes (2007). “Structure-property relationships and melt rheology of segmented, non-chain extended polyureas: Effect of soft segment molecular weight,” Polymer POLMAG 0032-386148, 290301. 10.1016/j.polymer.2006.10.029

J. P. Sheth , A. Aneja , G. L. Wilkes , E. Yilgor , G. E. Atilla , I. Yilgor , and F. Beyer (2004). “Influence of system variables on the morphological and dynamic mechanical behavior of polydimethylsiloxane based segmented polyurethane and polyurea copolymers: A comparative perspective,” Polymer POLMAG 0032-386145, 69196932. 10.1016/j.polymer.2004.06.057

Z. Xue , and J. W. Hutchinson (2007). “Neck retardation and enhanced energy absorption in metal–elastomer bilayers,” Mech. Mater. MSMSD3 0167-663639, 473487. 10.1016/j.mechmat.2006.08.002

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Powder Diffraction
  • ISSN: 0885-7156
  • EISSN: 1945-7413
  • URL: /core/journals/powder-diffraction
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