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مجله رفتار مکانیکی مواد زیست پزشکی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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    • تاریخ ارائه: 1394/01/01
    • تاریخ انتشار در تی پی بین: 1394/01/01
    • تعداد بازدید: 722
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the present study investigates the mechanical properties of three embolization microspheres (e-ms): tris-acryl gelatin microspheres (tg-ms), acrylamido polyvinyl alcohol microspheres (apva-ms), and polyphosphazene-coated polymethylmethacrylate microspheres (pp-pmma-ms). compression and relaxation tests were performed on monolayers of particles and their young’s moduli and relaxation half times (rhts) were determined. the elasticity of e-ms was evaluated by applying hertz theory with the assumptions of incompressibility and a poisson’s ratio of 0.5. the young’s moduli of tg-ms, apva-ms, and pp-pmma-ms were 39.6 ± 5.05 kpa, 18.8±4.00 kpa, and 13.6±1.98 kpa, respectively. the rhts of tg-ms, apva-ms, and pp-pmma-ms were 52.3 ± 5.56 s, 59.1 ± 8.16 s, and 31.0 ± 7.01 s, respectively. tg-ms have a high rigidity and deform slightly under a sustained compression since they have a high elasticity. pp-pmma-ms are soft and deform a lot under sustained compression. they are more viscous than the other two microspheres. apva-ms have intermediate material properties, having the same low rigidity as pp-pmma-ms and being more elastic than tg-ms.

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