Mrówka Maciej, Machoczek Tomasz, Jureczko Paweł, Joszko Kamil, Gzik Marek, Wolański Wojciech, Wilk Krzysztof
Department of Theoretical and Applied Mechanics, Faculty of Mechanical Engineering, Silesian University of Technology, 18A Konarskiego Str., 44-100 Gliwice, Poland.
Biotechnology Center, Silesian University of Technology, Krzywoustego 8 Str., 44-100 Gliwice, Poland.
Materials (Basel). 2021 May 21;14(11):2717. doi: 10.3390/ma14112717.
As part of the experiments herein, the mechanical properties of specimens made of poly-ether-ether-ketone (PEEK) material using 3D printing technology were determined. Two populations of specimens were investigated, the first of which contained an amorphous structure, while the other held a crystal structure. The studies also investigated the influence of the print directionality on the mechanical properties obtained. Static tensile, three-point bending, and impact tests were carried out. The results for the effect of the structure type on the tensile properties showed that the modulus of elasticity was approximately 20% higher for the crystal than for the amorphous PEEK form. The Poisson's ratios were similar, but the ratio was slightly higher for the amorphous samples than the crystalline ones. Furthermore, the studies included a chemical PEEK modification to increase the hydrophilicity. For this purpose, nitrite and hydroxyl groups were introduced into the chain by chemical reactions. The results demonstrate that the modified PEEK specimens had worse thermoplastic properties than the unmodified specimens.
作为本文实验的一部分，测定了采用3D打印技术由聚醚醚酮（PEEK）材料制成的试样的力学性能。研究了两组试样，第一组具有非晶结构，另一组具有晶体结构。研究还考察了打印方向性对所得力学性能的影响。进行了静态拉伸、三点弯曲和冲击试验。结构类型对拉伸性能影响的结果表明，晶体PEEK的弹性模量比非晶态PEEK高约20%。泊松比相似，但非晶态样品的该比值略高于晶体样品。此外，研究包括对PEEK进行化学改性以提高亲水性。为此，通过化学反应将亚硝酸盐和羟基引入链中。结果表明，改性PEEK试样的热塑性性能比未改性试样差。
