Spina Roberto, Cavalcante Bruno
Dipartimento di Meccanica, Matematica e Management, Politecnico di Bari, 70125 Bari, Italy.
Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Bari, 70125 Bari, Italy.
Polymers (Basel). 2021 Jul 22;13(15):2401. doi: 10.3390/polym13152401.
The material performance of polyamide (PA) samples made with fused filament fabrication (FFF) was analyzed. The authors implemented a well-structured framework to identify the filaments main properties before processing them and characterizing the printed samples. Unfilled and glass-fiber reinforced PA were investigated, focusing on moisture absorption and its effects on dimensional stability and mechanical performance. The properties were collected using differential scanning calorimetry and Fourier-transform infrared spectroscopy, whereas the specimens were characterized by employing compression tests. This framework allowed for the moisture determination, as well as the influence of the moisture absorption. A significant impact was detected for the glass-fiber reinforced PA, with a decrease in the dimensional and mechanical performance. The novelty of this study was to define a well-structured framework for testing the moisture influence of FFF components.
分析了采用熔融长丝制造（FFF）工艺制备的聚酰胺（PA）样品的材料性能。作者实施了一个结构良好的框架，以在加工长丝之前识别其主要特性，并对打印样品进行表征。研究了未填充和玻璃纤维增强的PA，重点关注吸湿及其对尺寸稳定性和机械性能的影响。使用差示扫描量热法和傅里叶变换红外光谱法收集性能数据，而通过压缩试验对样品进行表征。该框架能够确定水分含量以及吸湿的影响。检测到玻璃纤维增强PA有显著影响，其尺寸和机械性能下降。本研究的新颖之处在于定义了一个结构良好的框架来测试FFF组件的吸湿影响。
