Abstract
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.
Highlights
Modern industries, especially mechanical and biomedical engineering, are constantly searching for construction materials that may, due to enhanced useful properties and increased durability, replace the materials utilized far [1,2]
The samples were manufactured according to the ASTM D790-02 Standard Test Method [29] with the use of incremental technology through fused deposition modeling (FDM), which is a method of forming liquid thermoplastic
Samples were taken in the form of a fragment of an unground filament made of PEEK, ground PEEK grains, and the three modification products
Summary
Especially mechanical and biomedical engineering, are constantly searching for construction materials that may, due to enhanced useful properties and increased durability, replace the materials utilized far [1,2]. Continuous progress in the field of material engineering provides an opportunity to produce new or improved structural materials, which must undergo extensive research before their production can be optimized and approved for use [2,3]. A main focus of the manufacturing industry is determining the possibility of composite material applications, which often replaces those in previous use [7,8]. An important aspect of the new materials is their non-toxicity to the environment, understood as both the impact of the entire material and that of products of possible degradation [13,14]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
