Volume 3, Issue 2

Original research papers

Biomedical Engineering

VISUALIZATION AND MORPHOLOGICAL CHARACTERIZATION OF INTEGRAL SKIN CELLULAR POLYMERIC COMPOSITES USING X-RAY MICROTOMOGRAPHY

R. Pop-Iliev, W. Y. Pao, P. Karimipour-Fard, G. Rizvi

Pages: 143-146

DOI: 10.21175/RadJ.2018.02.024

Received: 14 JUN 2018, Received revised: 9 OCT 2018, Accepted: 26 OCT 2018, Published online: 27 DEC 2018

This paper focuses on 3-dimensional non-destructive characterization of the morphologies of integral-skin cellular polymeric composites using X-ray Microtomography. Rapid Rotational Foam Molding (RRFM) is a polymer processing technology that is capable of creating composites with intricate shapes that have a foamed core surrounded by an integral solid skin layer (similar to the structure of a bone). The analyzed specimens were extracted from composites processed in RRFM having a solid skin made of polypropylene (PP) grades combined with foamed cores made of both polyethylene (PE) and PP grades by implementing a suitable chemical blowing agent (CBA) in extrusion. The resulting cellular structures pertaining to the foamed core and the near-skin area were visualized and their morphological quality was evaluated in terms of cell size distribution and cell density. The stress-strain behavior and 3-dimensional structural changes were monitored and characterized with in-situ compression testing.
  1. P. Bianco, M. Riminucci, S. Gronthos, P. Gehron, “Bone marrow stromal stem cells: nature, biology, and potential applications,” Stem Cells, vol. 19, no. 3, pp. 180 – 192, 2001.
    DOI: 10.1634/stemcells.19-3-180
    PMid: 11359943
  2. V. Karageorgiou, D. Kaplan, “Porosity of 3D biomaterial scaffolds and osteogenesis,” Biomaterials, vol. 26, no. 27, pp. 5474 – 5491, Sep. 2005.
    DOI: 10.1016/j.biomaterials.2005.02.002
    PMid: 15860204
  3. R. Pop-Iliev, “Processing of Integral Skin Cellular Polymeric Composites in Rapid Rotational Foam Molding,” Acta Phys. Pol. A, vol. 120, no. 2, pp. 292 – 297, 2011.
    DOI: 10.12693/APhysPolA.120.292
  4. R. Pop-Iliev, K. A. Christian, E. S. Abdalla, “Rapid Rotational Foam Molding Process,” US 8628704 B2, USA, Jan. 14, 2014.
    Retrieved from: https://patentimages.storage.googleapis.com/2d/40/f5/63d6a3b37d3ca0/US8628704.pdf;
    Retrieved on: Jun. 24, 2017
  5. K. Holmes, M. Elkington, P. Harris, “Clark’s Essential Physics in Imaging for Radiographers,” Boca Raton (FL), USA: CRC Press, ch. 5-6, sec. 3-14, pp. 68 – 90, 2013.
    DOI: 10.1201/b15383
  6. N. Aubee, P. Lam, S. Marshall, “A New Family of sHDPE Polymers for Enhanced Moisture Barrier Performance,” J. Plast. Film Sheeting, vol. 22, no. 4, pp. 315 – 330, Oct. 2006.
    DOI: 10.1177/8756087906073121
  7. P. Karimipour-Fard, W. Y. Pao, G. Rizvi, R. Pop-Iliev, “The Use of Microcomputed Tomography to Evaluate Integral-Skin Cellular Polyolefin Composites,” in Book of Abstr. Micro-CT Meeting 2018 (Micro-CT 2018), Ghent, Belgium, 2018, pp. 41 – 44.
    Retrieved from: https://www.bruker.com/fileadmin/user_upload/8-PDF-Docs/Microtomography/
    UserMeeting/AbstractBook2018.pdf
    ;
    Retrieved on: Jun. 17, 2018