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Mechanical Properties of Additively Manufactured New Polymer Blend (Polylactic Acid-Polycarbonate Urethane) with Varying Printing Layer Thickness.

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Title: Mechanical Properties of Additively Manufactured New Polymer Blend (Polylactic Acid-Polycarbonate Urethane) with Varying Printing Layer Thickness.
Authors: Kazim, Muhammad Nur Akmal1 (AUTHOR), Abdollah, Mohd Fadzli Bin1,2 (AUTHOR) mohdfadzli@utem.edu.my, Amiruddin, Hilmi1,2 (AUTHOR), Liza, S.3 (AUTHOR), Ramli, Faiz Redza1,2 (AUTHOR)
Source: Journal of Materials Engineering & Performance. May2024, Vol. 33 Issue 9, p4461-4469. 9p.
Subjects: Polylactic acid, Polymer blends, Urethane, Failure mode & effects analysis, Young's modulus, Hardness testing, Scanning electron microscopy
Abstract: The purpose of this study is to investigate the effect of varying printing layer thicknesses on the mechanical properties of a new 3D-printed polymer blend made of polylactic acid (PLA) and polycarbonate urethane (PCU). The specimen was created using the fused filament fabrication process. A universal testing machine and a Shore D durometer were used to perform the compression and hardness tests, respectively. Scanning electron microscopy (SEM) and an optical microscope were used to examine the surface morphology and failure mode of the tested specimens. The results showed that adding PCU to PLA decreased the compressive strength and Young's modulus of the 3D-printed polymer blend compared to 3D-printed PLA. The mechanical properties of 3D-printed specimens are also affected by the printing layer thickness. The hardness-to-elasticity ratio was also discovered to be a crucial characteristic when designing and selecting materials to enable proper load transfer. From the SEM image analysis, the cross-sectional surface area of the compression-molded specimen is smoother than that of the 3D-printed specimen, contributing to various types of failure modes for both specimens. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The purpose of this study is to investigate the effect of varying printing layer thicknesses on the mechanical properties of a new 3D-printed polymer blend made of polylactic acid (PLA) and polycarbonate urethane (PCU). The specimen was created using the fused filament fabrication process. A universal testing machine and a Shore D durometer were used to perform the compression and hardness tests, respectively. Scanning electron microscopy (SEM) and an optical microscope were used to examine the surface morphology and failure mode of the tested specimens. The results showed that adding PCU to PLA decreased the compressive strength and Young's modulus of the 3D-printed polymer blend compared to 3D-printed PLA. The mechanical properties of 3D-printed specimens are also affected by the printing layer thickness. The hardness-to-elasticity ratio was also discovered to be a crucial characteristic when designing and selecting materials to enable proper load transfer. From the SEM image analysis, the cross-sectional surface area of the compression-molded specimen is smoother than that of the 3D-printed specimen, contributing to various types of failure modes for both specimens. [ABSTRACT FROM AUTHOR]
ISSN:10599495
DOI:10.1007/s11665-023-08261-1