Investigation of 3D printed polymer and moulded composites in hot concentrated acid

Aje, Damilola and Yang, Liu (2022) Investigation of 3D printed polymer and moulded composites in hot concentrated acid. In: The 20th European Conference on Composite Materials, 2022-06-26 - 2022-06-30.

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Abstract

This paper investigates the resistance of polymer composites after being soaked in a hot (85oC) concentrated (85%wt) phosphoric acid solution, it compares the rate of acid intake by different selected polymeric materials, and conduct an analysis on the impact of acid intake and elevated temperature on the baseline mechanical properties of the polymer composites. Four polymers and polymer composites were selected among the common high-performing polymers used in structural applications in this investigation, two of which were 3D printed pure polymers while the other two was an injection moulded polymer composite. Investigation proved that mechanical properties of the selected polymers was not significantly affected by the hot acid. The strength and modulus remain unchanged, however, there is a significant drop in strength and modulus for the selected polymers when tested under elevated heat chamber of 95oC.

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