Effect of molecular weight on mechanical properties and microstructure of 3D printed poly(ether ether ketone),Polymer International

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Effect of molecular weight on mechanical properties and microstructure of 3D printed poly(ether ether ketone)
Polymer International ( IF 2.9 ) Pub Date : 2020-12-19 , DOI: 10.1002/pi.6166
Qinfei Xu ₁ , Yingshuang Shang ₁ , Zilong Jiang ₁ , Zhaoyang Wang ₁ , Chenyi Zhou ₁ , Xin Liu ₁ , Qixing Yan ₁ , Xuefeng Li ₁ , Haibo Zhang ₁

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Fused deposition modeling (FDM) has been successfully applied to the manufacturing of poly(ether ether ketone) (PEEK) special engineering plastics. However, due to the unavoidable defects caused by FDM technology and the high melt viscosity of PEEK, 3D printed PEEK parts have poor mechanical properties. In this study, the mechanical properties and microstructure of PEEK printed with different nozzle temperatures and having various molecular weights were researched in detail. The results showed that PEEK-033G with medium molecular weight had good fluidity. With a nozzle temperature of 410 °C and using a high-temperature chamber 3D printing system, the defects of 3D printed PEEK-033G were reduced significantly, and the tensile strength and flexural strength could reach 96 and 115 MPa, which is close to the performance obtained using injection molding. In addition, the tensile strength in the Z-axis direction was applied to characterize the interlayer bond strength. With a decrease of the viscosity of PEEK, an increase of interlayer bond strength ensued. It is expected that these findings could provide more insight for 3D printing of PEEK. © 2020 Society of Chemical Industry

中文翻译：

分子量对3D打印聚醚醚酮力学性能和微观结构的影响

熔融沉积成型 (FDM) 已成功应用于聚醚醚酮 (PEEK) 特种工程塑料的制造。然而，由于FDM技术带来的不可避免的缺陷以及PEEK的高熔体粘度，3D打印的PEEK零件的机械性能较差。在这项研究中，详细研究了在不同喷嘴温度和不同分子量下打印的 PEEK 的机械性能和微观结构。结果表明，中等分子量的PEEK-033G具有良好的流动性。喷嘴温度410℃，采用高温室3D打印系统，3D打印PEEK-033G的缺陷明显减少，拉伸强度和弯曲强度分别达到96和115MPa，这接近于使用注射成型获得的性能。此外，在拉伸强度Z轴方向用于表征层间结合强度。随着PEEK粘度的降低，层间结合强度随之增加。预计这些发现可以为 PEEK 的 3D 打印提供更多见解。© 2020 化学工业协会

更新日期：2020-12-19

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