Optimizing 3D-Printing Parameters for Enhanced Mechanical Properties in Liquid Crystalline Polymer Components

This study investigates the influence of three critical 3D-printing parameters—layer height, print speed, and extrusion temperature—on the mechanical properties of liquid crystalline polymer 3D-printed specimens, using a low-end 3D-printer. The extrusion process during 3D-printing can further align the molecular domains within the material along a common direction, leading to a reinforced polymer structure with superior properties. Specifically, the tensile strength, deformation at rupture, and flexural elastic modulus were evaluated to determine how layer height, print speed, and extrusion temperature affect the structural integrity of the printed components. The results demonstrate a significant improvement in both tensile strength and flexural modulus with the reduction of layer height from 0.16 to 0.08 mm. The study highlights the challenges associated with interlayer adhesion in liquid crystalline polymers 3D-printing, which is crucial for optimizing the mechanical performance of printed parts. Post-processing annealing was conducted over a wide temperature range (100°C–250°C), revealing its potential to further enhance material strength, though molecular diffusion emerged as a limiting factor in its effectiveness. By successfully demonstrating these advancements with a low-end 3D printer, this research paves the way for wider adoption of liquid crystalline polymers in additive manufacturing. The use of accessible and cost-effective equipment ensures that these high-performance materials can be integrated into diverse applications, promoting democratization of advanced polymer technologies. © 2024 The Author(s). Polymers for Advanced Technologies published by John Wiley & Sons Ltd.