Hygromechanical Performance of Polyamide Specimens Made with Fused Filament Fabrication
Roberto Spina1,2,3, Bruno Cavalcante1,2
1Dipartimento di Meccanica, Matematica e Management, Politecnico di Bari, 70125 Bari, Italy.
Polymers
|August 10, 2021
Summary
This study analyzed polyamide (PA) performance using fused filament fabrication (FFF). Glass-fiber reinforced PA showed decreased dimensional and mechanical properties due to moisture absorption, highlighting the need for a structured testing framework.
Area of Science:
- Materials Science
- Additive Manufacturing
- Polymer Engineering
Background:
- Polyamide (PA) is a versatile polymer used in additive manufacturing.
- Fused Filament Fabrication (FFF) is a common 3D printing technique for polymers.
- Moisture absorption can significantly affect polymer properties.
Purpose of the Study:
- To analyze the material performance of polyamide (PA) samples produced via FFF.
- To investigate the effects of moisture absorption on dimensional stability and mechanical performance.
- To establish a structured framework for evaluating moisture influence on FFF components.
Main Methods:
- Characterization of unfilled and glass-fiber reinforced PA filaments.
- Differential Scanning Calorimetry (DSC) and Fourier-Transform Infrared Spectroscopy (FTIR) for property analysis.
- Compression tests to evaluate mechanical performance of printed PA specimens.
Main Results:
- A structured framework was implemented to assess filament properties and printed sample performance.
- Moisture absorption was quantified, and its impact on PA samples was determined.
- Glass-fiber reinforced PA exhibited a significant decrease in dimensional and mechanical performance due to moisture.
Conclusions:
- The study successfully defined a framework for testing moisture influence on FFF components.
- Moisture absorption poses a significant challenge to the dimensional and mechanical integrity of glass-fiber reinforced PA.
- Further research into moisture mitigation strategies for FFF-printed PA is warranted.


