The Effect of Strain Rate on the Tensile Properties of PMMA/Hydroxyapatite Composite
Publish place: The Iranian Journal of Materials Forming، Vol: 10، Issue: 2
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMF-10-2_005
تاریخ نمایه سازی: 14 شهریور 1402
Abstract:
To investigate the effect of the different content of hydroxyapatite (HA) (۵, ۱۰, and ۱۵ wt.%) on the tensile properties and deformation mechanism of the poly methylmethacrylate (PMMA), tensile test at different strain rate (۴.۱×۱۰-۴, ۸.۳×۱۰-۴,۱.۶۶×۱۰-۳, ۳.۳۱×۱۰-۳, ۸.۲۷۵×۱۰-۳, and ۱۶.۶×۱۰-۳ s-۱), microscopic evaluations were performed on the standard samples. The results of the tensile test showed that by adding HA to the PMMA, its strain rate sensitivity increased. The activation energy (ΔH) for chain fluctuation decreased from ۵۶.۴۲ to ۳۷.۸۱ J/mol as HA content increased from ۰ to ۱۵ wt.%. In addition, the active volume ( ) of the chain during the tensile test was measured indicating that its value decreased from ۳.۰۲ to ۲.۳۵ as HA content promoted from ۰ to ۱۵ wt.%. The results of microscopic evaluation showed that the deformation mechanism of PMMA during the tensile test was crazing and dispersity of craze depended strongly on the HA content.
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Authors
M. Farjamfar
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
S.M. Zebarjad
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
M.E. Bahrololoom
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
R. Bazargan-Lari
Department of Materials Science and Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
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