Characterization of Thermal and Structural Properties of Poly Lactic Acid Parts Fabricated By Fused Depositing Modeling

Subject Areas :

Mohsen Khalilian ¹ , Said Golabi ² , Mohammad Khodaei ³

1 - PhD Student, Mechanical Engineering Department, Kashan University, Kashan, Iran.
2 - Professor, Mechanical Engineering Department, Kashan University, Kashan, Iran.
3 - Materials Engineering Group, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan, Iran.

Received: 2020-02-07 Accepted : 2020-04-21 Published : 2022-02-20

Keywords: Fused deposition modeling, Bone tissue engineering, Poly Lactic Acid Implant, Printing Temperature,

Abstract :

Poly Lactic Acid implants are a good candidate for bone tissue engineering due to their favorable biodegradability and mechanical properties. In this study, after studying the structural and thermal properties of polymer by Fourier transform infrared spectroscopy (FTIR), differential calorimetery analysis (DSC), thermal gravimetery analysis (TG) and X-ray diffraction (XRD) tests, to determine the appropriate temperature range of 3D printing, rigid polylactic acid (PLA) implants were prepared by Fused Deposition Modeling FDM at three different temperatures of 200, 210 and 220 °C as standard tensile test specimens. The results of the tensile test showed that in this range, as the print temperature increased, the samples had higher strength and higher fracture stress. Also to further investigate the effect of the FDM temperature, scanning electron microscopy (SEM) images were taken from the surface of the printed samples. Microscopic images show that as the print temperature increases, the melt spray and diffusion are more severe and the sample surface is rough. The results show that 210 °C is the optimum temperature for PLA printing.

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