نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Cardiac stent are intracorporeal structures used to open blocked coronary arteries caused by fatty plaques or metabolic abnormalities, and they can be utilized in either temporary or permanent forms. In this study, the effect of pressure parameter in the additive bio-manufacturing process (FDM) on the loss coefficient (Tan δ) of smart polymeric stents was investigated. The objective of this research is to enhance the shape memory effect of polymeric stents without the use of plasticizers or lubricants, and without the addition of polymeric nanocomposites. The results obtained from experimental DMTA and SEM analysis indicate that pressure variation during manufacturing leads to an 18.8% reduction in the loss coefficient and enhances the shape memory effect in the range approaching the shape memory region. Additionally, the results confirm the increase in atomic Van der Waals forces and the reduction of covalent and molecular bond lengths within the structure of the memory stent. These molecular composition changes provide the memory stent with greater elasticity and an improved capacity for energy storage within the smart active range.
کلیدواژهها English
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