TY - JOUR

T1 - Effects of simulated body fluid on the mechanical properties of polycarbonate polyurethane produced via material jetting

AU - Petersmann, Sandra

AU - Huemer, Martin

AU - Hentschel, Lukas

AU - Arbeiter, Florian

N1 - Funding Information: This work was supported by the project CAMed ( COMET K-Project 871132 ) which is funded by the Austrian Federal Ministry of Transport, Innovation and Technology (BMVIT) and the Austrian Federal Ministry for Digital and Economic Affairs (BMDW) and the Styrian Business Promotion Agency (SFG) . Special thanks go to Nadine Wild and Franz Grassegger for the development of the used media cell. Publisher Copyright: © 2023 The Authors

PY - 2023/3/6

Y1 - 2023/3/6

N2 - A possible tissue substitute material, namely a thermoplastic polycarbonate polyurethane with two different hard-to-soft segment ratios, was produced via material jetting. Since application temperature and media can significantly alter the properties of polymeric materials, it is necessary to understand the impact of both. Therefore, tensile and high-cycle fatigue tests were performed without media as well as immersed in a simulated body fluid. The absorption of phosphate-buffered saline (PBS) led to a decrease in stiffness and tensile strength with a simultaneous increase in elongation at break. For the material with less hard segments, an elevated temperature resulted in a similar effect. More hard segments increase tensile strength and elongation at break. Furthermore, the fatigue behaviour deteriorates significantly with increasing fluid uptake. The fatigue strength of fully saturated specimens decreased by about 20% compared to untreated specimens. An absorption of approx. 20% of the PBS absorption maximum already showed a similar decrease.

AB - A possible tissue substitute material, namely a thermoplastic polycarbonate polyurethane with two different hard-to-soft segment ratios, was produced via material jetting. Since application temperature and media can significantly alter the properties of polymeric materials, it is necessary to understand the impact of both. Therefore, tensile and high-cycle fatigue tests were performed without media as well as immersed in a simulated body fluid. The absorption of phosphate-buffered saline (PBS) led to a decrease in stiffness and tensile strength with a simultaneous increase in elongation at break. For the material with less hard segments, an elevated temperature resulted in a similar effect. More hard segments increase tensile strength and elongation at break. Furthermore, the fatigue behaviour deteriorates significantly with increasing fluid uptake. The fatigue strength of fully saturated specimens decreased by about 20% compared to untreated specimens. An absorption of approx. 20% of the PBS absorption maximum already showed a similar decrease.

KW - Additive manufacturing

KW - ARBURG plastic Freeforming

KW - Environmental stress cracking

KW - ESC

KW - Media cell

KW - Polycarbonate polyurethane

UR - http://www.scopus.com/inward/record.url?scp=85149441183&partnerID=8YFLogxK

U2 - 10.1016/j.polymertesting.2023.107977

DO - 10.1016/j.polymertesting.2023.107977

M3 - Article

AN - SCOPUS:85149441183

VL - 120.2023

JO - Polymer Testing

JF - Polymer Testing

SN - 0142-9418

IS - March

M1 - 107977

ER -