Analysis of the Impact of Changes in Thermomechanical Properties of Annealed Semi-Crystalline Plastics on the Surface Condition after the Machining Process

Adam Gnatowski; Rafal Golebski; Piotr Sikora; Jana Petru; Jiri Hajnys

doi:10.3390/ma16134816

Analysis of the Impact of Changes in Thermomechanical Properties of Annealed Semi-Crystalline Plastics on the Surface Condition after the Machining Process

Materials (Basel). 2023 Jul 4;16(13):4816. doi: 10.3390/ma16134816.

Authors

Adam Gnatowski¹, Rafal Golebski¹, Piotr Sikora², Jana Petru³, Jiri Hajnys³

Affiliations

¹ Department of Technology and Automation, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, 42-201 Czestochowa, Poland.
² Production Services on Automatic Lathes, APJ Sikora, 42-200 Czestochowa, Poland.
³ Department of Machining, Assembly and Engineering Metrology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic.

Abstract

In this paper, the authors present a comparative analysis of the thermomechanical properties of plastics intended for machining before and after the annealing process. The research included the dynamic properties, thermal analysis and a study of the surface after machining. The dynamic properties were tested using the DMTA method. The characteristics of changes in the value of the storage modulus E' and the tangent of the mechanical loss angle tgδ depending on the temperature and vibration frequency were determined. The thermal properties were tested using the DSC method, and a comparative analysis of the roughness parameters of the tested materials obtained from the profilometer was carried out. The presented studies indicate the extent of the impact of the annealing process on the machinability of structural polymer materials, taking into account the analysis of changes in the thermomechanical properties of the tested materials.

Keywords: annealed; machinability; melting; polymeric materials; thermomechanical properties.

Grants and funding

The work has been carried out in connection with the project ‘Innovative and additive manufacturing technology—new technological solutions for 3D printing of metals and composite materials’, reg. no. CZ.02.1.01/0.0/0.0/17_049/0008407, financed by the Structural and Investment Funds of the European Union.